{"title":"Grimmspeed Engine Head Gaskets","description":"\u003cstyle\u003e\n.seo-block { max-width: 920px; margin: 10px auto 34px; padding: 0 16px; line-height: 1.65; }\n.seo-block p { margin: 0 0 14px; }\n.seo-block .seo-links { margin-bottom: 20px; }\n.seo-block .seo-links strong { display: block; margin-bottom: 10px; font-size: 1.05em; }\n.seo-block .seo-links a { display: inline-block; margin: 0 6px 8px 0; padding: 5px 12px; border: 1px solid #d4d4d4; border-radius: 999px; background: #f7f7f7; color: #232323; text-decoration: none; font-size: 0.92em; line-height: 1.4; }\n.seo-block .seo-links a:hover { background: #232323; color: #ffffff; border-color: #232323; }\n.seo-block h3 { margin: 28px 0 14px; padding-top: 20px; border-top: 1px solid #e3e3e3; font-size: 1.3em; }\n.seo-block h4 { margin: 18px 0 6px; font-size: 1.02em; }\n\u003c\/style\u003e\n\u003cdiv class=\"seo-block\"\u003e\n\u003cp class=\"seo-links\"\u003e\u003cstrong\u003eMore Grimmspeed parts:\u003c\/strong\u003e\u003ca href=\"\/collections\/grimmspeed\"\u003eAll Grimmspeed parts\u003c\/a\u003e \u003ca href=\"\/collections\/grimmspeed-wrx-2022\"\u003eWRX 2022+\u003c\/a\u003e \u003ca href=\"\/collections\/grimmspeed-wrx-2015-2021\"\u003eWRX 2015-2021\u003c\/a\u003e \u003ca href=\"\/collections\/grimmspeed-wrx-2008-2014\"\u003eWRX 2008-2014\u003c\/a\u003e \u003ca href=\"\/collections\/grimmspeed-wrx-2002-2007\"\u003eWRX 2002-2007\u003c\/a\u003e \u003ca href=\"\/collections\/grimmspeed-sti-2015-2021\"\u003eSTI 2015-2021\u003c\/a\u003e \u003ca href=\"\/collections\/grimmspeed-sti-2008-2014\"\u003eSTI 2008-2014\u003c\/a\u003e \u003ca href=\"\/collections\/grimmspeed-sti-2004-2007\"\u003eSTI 2004-2007\u003c\/a\u003e \u003ca href=\"\/collections\/grimmspeed-brz-2022\"\u003eBRZ 2022+\u003c\/a\u003e \u003ca href=\"\/collections\/grimmspeed-brz-2013-2020\"\u003eBRZ 2013-2020\u003c\/a\u003e \u003ca href=\"\/collections\/grimmspeed-gr86-2022\"\u003eGR86 2022+\u003c\/a\u003e \u003ca href=\"\/collections\/grimmspeed-gaskets-and-hardware\"\u003eGaskets and Hardware\u003c\/a\u003e \u003ca href=\"\/collections\/grimmspeed-engine-covers-and-caps\"\u003eEngine Covers and Caps\u003c\/a\u003e \u003ca href=\"\/collections\/grimmspeed-engine-dress-up\"\u003eEngine Dress Up\u003c\/a\u003e \u003ca href=\"\/collections\/grimmspeed-intercoolers-top-mount\"\u003eIntercoolers Top Mount\u003c\/a\u003e \u003ca href=\"\/collections\/grimmspeed-interior-shift-knobs\"\u003eInterior Shift Knobs\u003c\/a\u003e \u003ca href=\"\/collections\/grimmspeed-intercoolers-front-mount\"\u003eIntercoolers Front Mount\u003c\/a\u003e \u003ca href=\"\/collections\/grimmspeed-engine-power-packages\"\u003eEngine Power Packages\u003c\/a\u003e \u003ca href=\"\/collections\/grimmspeed-cooling-radiator-shrouds\"\u003eCooling Radiator Shrouds\u003c\/a\u003e \u003ca href=\"\/collections\/grimmspeed-intake-cold-air\"\u003eIntake Cold Air\u003c\/a\u003e \u003ca href=\"\/collections\/grimmspeed-strut-bars\"\u003eStrut Bars\u003c\/a\u003e \u003ca href=\"\/collections\/grimmspeed-turbo-inlets-air-inlets\"\u003eTurbo Inlets \/ Air Inlets\u003c\/a\u003e \u003ca href=\"\/collections\/grimmspeed-electronics-boost-control-solenoids\"\u003eElectronics Boost Control Solenoids\u003c\/a\u003e \u003ca href=\"\/collections\/grimmspeed-exhaust-downpipes-and-y-pipes\"\u003eExhaust Downpipes and Y-Pipes\u003c\/a\u003e \u003ca href=\"\/collections\/grimmspeed-turbo-blow-off-valves\"\u003eTurbo Blow Off Valves\u003c\/a\u003e \u003ca href=\"\/collections\/grimmspeed-exterior-license-plate-holder\"\u003eExterior License Plate Holder\u003c\/a\u003e \u003ca href=\"\/collections\/grimmspeed-cooling-radiator-hoses\"\u003eCooling Radiator Hoses\u003c\/a\u003e \u003ca href=\"\/collections\/grimmspeed-exhaust-cat-back\"\u003eExhaust Cat Back\u003c\/a\u003e \u003ca href=\"\/collections\/grimmspeed-intercooler-piping\"\u003eIntercooler Piping\u003c\/a\u003e \u003ca href=\"\/collections\/grimmspeed-engine-batteries-and-tie-downs\"\u003eEngine Batteries and Tie downs\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003eShop Grimmspeed Engine Head Gaskets. This collection brings together every Grimmspeed product we catalogue under Engine Head Gaskets, in one place. Parts here can span many different vehicles, so use the fitment tags and notes on each product page to match the part to your car before ordering.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eWhat is included in Grimmspeed Engine Head Gaskets?\u003c\/h4\u003e\n\u003cp\u003eEvery Grimmspeed product in our catalogue tagged Engine Head Gaskets. Because the range covers many vehicles and years, each product's own fitment tags and notes are the source of truth for whether it suits your car.\u003c\/p\u003e\n\u003ch4\u003eWhich engine parts should I replace while things are apart?\u003c\/h4\u003e\n\u003cp\u003eAny time an engine or accessory is opened up, wear items like gaskets, seals and hardware are cheap insurance against doing the same job twice. Plan the full parts list before you start so everything goes back together in one pass.\u003c\/p\u003e\n\u003ch4\u003eWhere can I shop Grimmspeed parts by vehicle instead?\u003c\/h4\u003e\n\u003cp\u003eThe full Grimmspeed collection is linked at the top of this page, and Grimmspeed also breaks the range down by vehicle - WRX 2022+, WRX 2015-2021, WRX 2008-2014, WRX 2002-2007, STI 2015-2021, STI 2008-2014 and more are all linked above.\u003c\/p\u003e\n\u003c\/div\u003e","products":[{"product_id":"grimmspeed-head-gasket-set-subaru-wrx-2015-2021-brz-fr-s-ft-86-2013-grm124006","title":"GrimmSpeed 0.78mm Head Gasket Set Subaru WRX 2015-2021 \/ BRZ \/ FR-S \/ FT-86 2013+ | 124006","description":"\u003cp dir=\"ltr\"\u003eGrimmSpeed has set the standard for quality when it comes to aftermarket replacement gaskets so it’s only natural that we should offer our fans the MOST important gaskets their car will ever need: Introducing The GrimmSpeed FA20 Head Gasket Sets! \u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eFeature-packed, these gaskets are a perfect fit for any engine build, from basic refresh to a high horsepower track monster.\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eThe GrimmSpeed Head Gaskets feature a multi-layer steel (MLS) construction, in which multiple grades are used to provide optimal surface and combustion chamber sealing as they are torqued down. The top and bottom layers feature a Nitrile Rubberized Coating that helps accommodate a rougher RA surface finish of up to 50microinch. This acts to better seal the non-critical areas of the gasket. \u003c\/span\u003e\u003cspan\u003eIn addition, the gasket edge includes a folded stopper layer that allows for optimal sealing for the combustion chamber. This is done to help reduce the chances of combustion gasses causing head gasket failures under extremely high cylinder pressures that built engines can experience.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eAfter talking to numerous engine builders\/tuners it was clear that creating a variety of gasket thicknesses was key for pairing them with the right build. With that in mind, we’ve made the gaskets available in multiple thicknesses (.78, 1.05, 1.45mm) to help fine tune each individual build. In addition, the slightly oversized bore diameters will allow for up to 0.5mm overbore.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eThe FA gaskets were designed to be compatible in both FA20A (WRX) and FA20B (BRZ, FRS, 86). Meaning that it will be just as much at home in a lower power NA build as it will be in a high power boosted application. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eWe’ve outdone ourselves this time, The GrimmSpeed Head Gaskets carry on the legacy of \u003cstrong\u003equality\u003c\/strong\u003e that you’ve come to know from our other extremely popular gaskets.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch4 dir=\"ltr\"\u003eQuick Specs\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSold as a Set\/Pair - \u003c\/strong\u003eL and R side specific\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDie Cut Multi-Layer [Stainless] \u003c\/strong\u003e\u003cstrong\u003eSteel (MLS) Construction\u003c\/strong\u003e - Provides smooth edge finish and consistency from batch to batch, ±0.001” manufacturing tolerance\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFolded Stopper Layer to Better Seal the Combustion Chamber\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e.25micron Nitrile Rubber Layer Coating\u003c\/strong\u003e - Reduces chances of leaking on imperfectly smooth mating surfaces over non-coated gasket.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eCompatible with both FA20A (WRX) and FA20B (BRZ, FRS, 86)\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eAccommodates up to 86.5mm bore\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003e0.78mm, 1.05mm, 1.45mm thickness (after crushing)\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eTesting\u003c\/h4\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eGrimmSpeed High Performance Head Gaskets are designed to optimize combustion chamber sealing. This is done by using a unique gasket design feature which sets us apart from the competition. By strategically undercutting the middle layer of the gasket near the combustion chamber, we can control the crushing of outer layers, which in turn creates a perfect seal around the combustion chamber.  \u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eWe can visually demonstrate this feature by using pressure sensitive film and compressing the gasket in a manner which mimics the tightening of a head against the block. The film changes colors from white to pink to red as pressure is applied to denote areas of high and low pressure application. This information will then allow for easy visual verification of effectiveness in sealing of a gasket against a surface.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eAs seen in the results, the combustion chambers are sealed evenly and equally around the circumference of the cylinder by the deep part circles. This visual representation is showing that combustion gasses are going to be held in the chamber and directed towards pushing the piston instead of escaping. Failure of a gasket to seal with even pressure around the circumference of the cylinder would be detrimental for performance and reliability of a gasket and would most certainly result in failure.  \u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eWhen combining the perfect sealing, Nitrile Coating and other features of the gaskets, we are able to ensure that your engine build is ready for anything that you throw at it. From basic engine refreshes to full blown race builds, The Mark of Innovation from GrimmSpeed keeps you in control under pressure.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch4\u003eFitments\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003e15-20 WRX [FA20A]\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e13-20 BRZ\/FRS\/86 [FA20B]\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\u003cstrong\u003e\u003cu\u003e\u003cbr\u003e\u003cbr\u003e\u003c\/u\u003e\u003c\/strong\u003e\u003c\/p\u003e\n","brand":"GrimmSpeed","offers":[{"title":"Default Title","offer_id":32169003024480,"sku":"grm124006","price":178.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1398\/9853\/products\/GrimmSpeed-0_78mm-Head-Gasket-Set-Subaru-WRX-2015-2021-BRZ-FR-S-FT-86-2013-124006.jpg?v=1785327706"},{"product_id":"grimmspeed-head-gasket-set-subaru-sti-04-20-wrx-08-14-fxt-04-08-lgt-05-09-ej25-savcs-grm124000","title":"GrimmSpeed 0.78mm EJ25(SAVCS) Head Gasket Set Subaru STI 04-21 \/ WRX 08-14 \/ FXT 04-08 \/ LGT 05-09 | 124000","description":"\u003cp dir=\"ltr\"\u003eGrimmSpeed has set the standard for quality when it comes to aftermarket replacement gaskets so it’s only natural that we should offer our fans the MOST important gaskets their car will ever need: Introducing The GrimmSpeed EJ25 and FA20 Head Gasket Sets!\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eFeature-packed, these gaskets are a perfect fit for any engine build, from basic refresh to a high horsepower track monster.\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eThe GrimmSpeed Head Gaskets feature a multi-layer steel (MLS) construction, in which multiple grades are used to provide optimal surface and combustion chamber sealing as they are torqued down. The top and bottom layers feature a Nitrile Rubberized Coating that helps accommodate a rougher RA surface finish of up to 50microinch. This acts to better seal the non-critical areas of the gasket. \u003c\/span\u003e\u003cspan\u003eIn addition, the gasket edge includes a folded stopper layer that allows for optimal sealing for the combustion chamber. This is done to help reduce the chances of combustion gasses causing head gasket failures under extremely high cylinder pressures that built engines can experience.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eAfter talking to numerous engine builders\/tuners it was clear that creating a variety of gasket thicknesses was key for pairing them with the right build. With that in mind, we’ve made the gaskets available in multiple thicknesses (.78, 1.1, 1.5mm) to help fine tune each individual build. In addition, the slightly oversized bore diameters will allow for up to 0.5mm overbore.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eThe EJ specific gaskets include enlarged center head bolt holes to accommodate up to a 13mm head studs. This is a popular upgrade option for many higher power builds, where additional cylinder head clamping force is needed.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eWe’ve outdone ourselves this time, The GrimmSpeed Head Gaskets carry on the legacy of \u003cstrong\u003equality\u003c\/strong\u003e that you’ve come to know from our other extremely popular gaskets.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch4 dir=\"ltr\"\u003e\u003cspan\u003eQuick Specs\u003c\/span\u003e\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSold as a Set\/Pair - \u003c\/strong\u003eSingle and Dual AVCS fitmentt\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDie Cut Multi-Layer [Stainless] \u003c\/strong\u003e\u003cstrong\u003eSteel (MLS) Construction\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- Provides smooth edge finish and consistency from batch to batch, ±0.001” manufacturing tolerance\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFolded Stopper Layer to Better Seal the Combustion Chamber\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e.25micron Nitrile Rubber Layer Coating\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- Reduces chances of leaking on imperfectly smooth mating surfaces over non-coated gasket.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eAccommodates up to 100.0mm bore\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eCompatible with up to 13mm, ½” studs\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003e0.78mm, 1.1mm and 1.5mm thickness (after crushing)\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4 dir=\"ltr\"\u003eTesting\u003c\/h4\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eGrimmSpeed High Performance Head Gaskets are designed to optimize combustion chamber sealing. This is done by using a unique gasket design feature which sets us apart from the competition. By strategically undercutting the middle layer of the gasket near the combustion chamber, we can control the crushing of outer layers, which in turn creates a perfect seal around the combustion chamber. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eWe can visually demonstrate this feature by using pressure sensitive film and compressing the gasket in a manner which mimics the tightening of a head against the block. The film changes colors from white to pink to red as pressure is applied to denote areas of high and low pressure application. This information will then allow for easy visual verification of effectiveness in sealing of a gasket against a surface.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eAs seen in the results, the combustion chambers are sealed evenly and equally around the circumference of the cylinder by the deep part circles. This visual representation is showing that combustion gasses are going to be held in the chamber and directed towards pushing the piston instead of escaping. Failure of a gasket to seal with even pressure around the circumference of the cylinder would be detrimental for performance and reliability of a gasket and would most certainly result in failure. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eWhen combining the perfect sealing, nitrile coating and other features of the gaskets, we are able to ensure that your engine build is ready for anything that you throw at it. From basic engine refreshes to full blown race builds, The Mark of Innovation from GrimmSpeed keeps you in control under pressure!\u003c\/span\u003e\u003c\/p\u003e\n\u003ch4\u003eFitments\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e04-07 STI [EJ25 SAVCS]\u003c\/li\u003e\n\u003cli\u003e08-14 WRX [EJ25 SAVCS]\u003c\/li\u003e\n\u003cli\u003e04-08 FXT [EJ25 SAVCS]\u003c\/li\u003e\n\u003cli\u003e05-09 LGT [EJ25 SAVCS]\u003c\/li\u003e\n\u003cli\u003e08-21 STI [EJ25B DAVCS]\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cu\u003e\u003cbr\u003e\u003cbr\u003e\u003c\/u\u003e\u003c\/strong\u003e\u003c\/p\u003e","brand":"GrimmSpeed","offers":[{"title":"Default Title","offer_id":32169054666848,"sku":"grm124000","price":146.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1398\/9853\/products\/GrimmSpeed-0_78mm-EJ25SAVCS-Head-Gasket-Set-Subaru-STI-04-21-WRX-08-14-FXT-04-08-LGT-05-09-124000.jpg?v=1785327708"},{"product_id":"grimmspeed-head-gasket-set-subaru-sti-04-21-wrx-08-14-fxt-04-08-lgt-05-09-ej25-savcs-1-10mm-ej25savcs","title":"GrimmSpeed 1.10mm EJ25(SAVCS) Head Gasket Set Subaru STI 04-21 \/ WRX 08-14 \/ FXT 04-08 \/ LGT 05-09 | 124001","description":"\u003cp dir=\"ltr\"\u003eGrimmSpeed has set the standard for quality when it comes to aftermarket replacement gaskets so it’s only natural that we should offer our fans the MOST important gaskets their car will ever need: Introducing The GrimmSpeed EJ25 and FA20 Head Gasket Sets!\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eFeature-packed, these gaskets are a perfect fit for any engine build, from basic refresh to a high horsepower track monster.\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eThe GrimmSpeed Head Gaskets feature a multi-layer steel (MLS) construction, in which multiple grades are used to provide optimal surface and combustion chamber sealing as they are torqued down. The top and bottom layers feature a Nitrile Rubberized Coating that helps accommodate a rougher RA surface finish of up to 50microinch. This acts to better seal the non-critical areas of the gasket. \u003c\/span\u003e\u003cspan\u003eIn addition, the gasket edge includes a folded stopper layer that allows for optimal sealing for the combustion chamber. This is done to help reduce the chances of combustion gasses causing head gasket failures under extremely high cylinder pressures that built engines can experience.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eAfter talking to numerous engine builders\/tuners it was clear that creating a variety of gasket thicknesses was key for pairing them with the right build. With that in mind, we’ve made the gaskets available in multiple thicknesses (.78, 1.1, 1.5mm) to help fine tune each individual build. In addition, the slightly oversized bore diameters will allow for up to 0.5mm overbore.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eThe EJ specific gaskets include enlarged center head bolt holes to accommodate up to a 13mm head studs. This is a popular upgrade option for many higher power builds, where additional cylinder head clamping force is needed.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eWe’ve outdone ourselves this time, The GrimmSpeed Head Gaskets carry on the legacy of \u003cstrong\u003equality\u003c\/strong\u003e that you’ve come to know from our other extremely popular gaskets.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch4 dir=\"ltr\"\u003e\u003cspan\u003eQuick Specs\u003c\/span\u003e\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSold as a Set\/Pair - \u003c\/strong\u003eSingle and Dual AVCS fitmentt\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDie Cut Multi-Layer [Stainless] \u003c\/strong\u003e\u003cstrong\u003eSteel (MLS) Construction\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- Provides smooth edge finish and consistency from batch to batch, ±0.001” manufacturing tolerance\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFolded Stopper Layer to Better Seal the Combustion Chamber\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e.25micron Nitrile Rubber Layer Coating\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- Reduces chances of leaking on imperfectly smooth mating surfaces over non-coated gasket.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eAccommodates up to 100.0mm bore\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eCompatible with up to 13mm, ½” studs\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003e0.78mm, 1.1mm and 1.5mm thickness (after crushing)\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4 dir=\"ltr\"\u003eTesting\u003c\/h4\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eGrimmSpeed High Performance Head Gaskets are designed to optimize combustion chamber sealing. This is done by using a unique gasket design feature which sets us apart from the competition. By strategically undercutting the middle layer of the gasket near the combustion chamber, we can control the crushing of outer layers, which in turn creates a perfect seal around the combustion chamber. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eWe can visually demonstrate this feature by using pressure sensitive film and compressing the gasket in a manner which mimics the tightening of a head against the block. The film changes colors from white to pink to red as pressure is applied to denote areas of high and low pressure application. This information will then allow for easy visual verification of effectiveness in sealing of a gasket against a surface.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eAs seen in the results, the combustion chambers are sealed evenly and equally around the circumference of the cylinder by the deep part circles. This visual representation is showing that combustion gasses are going to be held in the chamber and directed towards pushing the piston instead of escaping. Failure of a gasket to seal with even pressure around the circumference of the cylinder would be detrimental for performance and reliability of a gasket and would most certainly result in failure. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eWhen combining the perfect sealing, nitrile coating and other features of the gaskets, we are able to ensure that your engine build is ready for anything that you throw at it. From basic engine refreshes to full blown race builds, The Mark of Innovation from GrimmSpeed keeps you in control under pressure!\u003c\/span\u003e\u003c\/p\u003e\n\u003ch4\u003eFitments\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e04-07 STI [EJ25 SAVCS]\u003c\/li\u003e\n\u003cli\u003e08-14 WRX [EJ25 SAVCS]\u003c\/li\u003e\n\u003cli\u003e04-08 FXT [EJ25 SAVCS]\u003c\/li\u003e\n\u003cli\u003e05-09 LGT [EJ25 SAVCS]\u003c\/li\u003e\n\u003cli\u003e08-21 STI [EJ25B DAVCS]\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cu\u003e\u003cbr\u003e\u003cbr\u003e\u003c\/u\u003e\u003c\/strong\u003e\u003c\/p\u003e","brand":"GrimmSpeed","offers":[{"title":"Default Title","offer_id":41922417492064,"sku":"grm124001","price":146.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1398\/9853\/products\/GrimmSpeed-0_78mm-EJ25SAVCS-Head-Gasket-Set-Subaru-STI-04-21-WRX-08-14-FXT-04-08-LGT-05-09-124000.jpg?v=1785327708"},{"product_id":"grimmspeed-head-gasket-set-subaru-wrx-2015-2021-brz-fr-s-ft-86-2013-1-45mm","title":"GrimmSpeed 1.45mm Head Gasket Set Subaru WRX 2015-2021 \/ BRZ \/ FR-S \/ FT-86 2013+ | 124008","description":"\u003cp dir=\"ltr\"\u003eGrimmSpeed has set the standard for quality when it comes to aftermarket replacement gaskets so it’s only natural that we should offer our fans the MOST important gaskets their car will ever need: Introducing The GrimmSpeed FA20 Head Gasket Sets! \u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eFeature-packed, these gaskets are a perfect fit for any engine build, from basic refresh to a high horsepower track monster.\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eThe GrimmSpeed Head Gaskets feature a multi-layer steel (MLS) construction, in which multiple grades are used to provide optimal surface and combustion chamber sealing as they are torqued down. The top and bottom layers feature a Nitrile Rubberized Coating that helps accommodate a rougher RA surface finish of up to 50microinch. This acts to better seal the non-critical areas of the gasket. \u003c\/span\u003e\u003cspan\u003eIn addition, the gasket edge includes a folded stopper layer that allows for optimal sealing for the combustion chamber. This is done to help reduce the chances of combustion gasses causing head gasket failures under extremely high cylinder pressures that built engines can experience.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eAfter talking to numerous engine builders\/tuners it was clear that creating a variety of gasket thicknesses was key for pairing them with the right build. With that in mind, we’ve made the gaskets available in multiple thicknesses (.78, 1.05, 1.45mm) to help fine tune each individual build. In addition, the slightly oversized bore diameters will allow for up to 0.5mm overbore.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eThe FA gaskets were designed to be compatible in both FA20A (WRX) and FA20B (BRZ, FRS, 86). Meaning that it will be just as much at home in a lower power NA build as it will be in a high power boosted application. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eWe’ve outdone ourselves this time, The GrimmSpeed Head Gaskets carry on the legacy of \u003cstrong\u003equality\u003c\/strong\u003e that you’ve come to know from our other extremely popular gaskets.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch4 dir=\"ltr\"\u003eQuick Specs\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSold as a Set\/Pair - \u003c\/strong\u003eL and R side specific\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDie Cut Multi-Layer [Stainless] \u003c\/strong\u003e\u003cstrong\u003eSteel (MLS) Construction\u003c\/strong\u003e - Provides smooth edge finish and consistency from batch to batch, ±0.001” manufacturing tolerance\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFolded Stopper Layer to Better Seal the Combustion Chamber\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e.25micron Nitrile Rubber Layer Coating\u003c\/strong\u003e - Reduces chances of leaking on imperfectly smooth mating surfaces over non-coated gasket.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eCompatible with both FA20A (WRX) and FA20B (BRZ, FRS, 86)\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eAccommodates up to 86.5mm bore\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003e0.78mm, 1.05mm, 1.45mm thickness (after crushing)\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eTesting\u003c\/h4\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eGrimmSpeed High Performance Head Gaskets are designed to optimize combustion chamber sealing. This is done by using a unique gasket design feature which sets us apart from the competition. By strategically undercutting the middle layer of the gasket near the combustion chamber, we can control the crushing of outer layers, which in turn creates a perfect seal around the combustion chamber.  \u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eWe can visually demonstrate this feature by using pressure sensitive film and compressing the gasket in a manner which mimics the tightening of a head against the block. The film changes colors from white to pink to red as pressure is applied to denote areas of high and low pressure application. This information will then allow for easy visual verification of effectiveness in sealing of a gasket against a surface.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eAs seen in the results, the combustion chambers are sealed evenly and equally around the circumference of the cylinder by the deep part circles. This visual representation is showing that combustion gasses are going to be held in the chamber and directed towards pushing the piston instead of escaping. Failure of a gasket to seal with even pressure around the circumference of the cylinder would be detrimental for performance and reliability of a gasket and would most certainly result in failure.  \u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eWhen combining the perfect sealing, Nitrile Coating and other features of the gaskets, we are able to ensure that your engine build is ready for anything that you throw at it. From basic engine refreshes to full blown race builds, The Mark of Innovation from GrimmSpeed keeps you in control under pressure.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch4\u003eFitments\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003e15-20 WRX [FA20A]\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e13-20 BRZ\/FRS\/86 [FA20B]\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\u003cstrong\u003e\u003cu\u003e\u003cbr\u003e\u003cbr\u003e\u003c\/u\u003e\u003c\/strong\u003e\u003c\/p\u003e\n","brand":"GrimmSpeed","offers":[{"title":"Default Title","offer_id":41922417524832,"sku":"grm124008","price":178.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1398\/9853\/products\/GrimmSpeed-0_78mm-Head-Gasket-Set-Subaru-WRX-2015-2021-BRZ-FR-S-FT-86-2013-124006.jpg?v=1785327706"},{"product_id":"grimmspeed-head-gasket-set-subaru-wrx-2015-2021-brz-fr-s-ft-86-2013-1-05mm","title":"GrimmSpeed 1.05mm Head Gasket Set Subaru WRX 2015-2021 \/ BRZ \/ FR-S \/ FT-86 2013+ | 124007","description":"\u003cp dir=\"ltr\"\u003eGrimmSpeed has set the standard for quality when it comes to aftermarket replacement gaskets so it’s only natural that we should offer our fans the MOST important gaskets their car will ever need: Introducing The GrimmSpeed FA20 Head Gasket Sets! \u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eFeature-packed, these gaskets are a perfect fit for any engine build, from basic refresh to a high horsepower track monster.\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eThe GrimmSpeed Head Gaskets feature a multi-layer steel (MLS) construction, in which multiple grades are used to provide optimal surface and combustion chamber sealing as they are torqued down. The top and bottom layers feature a Nitrile Rubberized Coating that helps accommodate a rougher RA surface finish of up to 50microinch. This acts to better seal the non-critical areas of the gasket. \u003c\/span\u003e\u003cspan\u003eIn addition, the gasket edge includes a folded stopper layer that allows for optimal sealing for the combustion chamber. This is done to help reduce the chances of combustion gasses causing head gasket failures under extremely high cylinder pressures that built engines can experience.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eAfter talking to numerous engine builders\/tuners it was clear that creating a variety of gasket thicknesses was key for pairing them with the right build. With that in mind, we’ve made the gaskets available in multiple thicknesses (.78, 1.05, 1.45mm) to help fine tune each individual build. In addition, the slightly oversized bore diameters will allow for up to 0.5mm overbore.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eThe FA gaskets were designed to be compatible in both FA20A (WRX) and FA20B (BRZ, FRS, 86). Meaning that it will be just as much at home in a lower power NA build as it will be in a high power boosted application. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eWe’ve outdone ourselves this time, The GrimmSpeed Head Gaskets carry on the legacy of \u003cstrong\u003equality\u003c\/strong\u003e that you’ve come to know from our other extremely popular gaskets.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch4 dir=\"ltr\"\u003eQuick Specs\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSold as a Set\/Pair - \u003c\/strong\u003eL and R side specific\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDie Cut Multi-Layer [Stainless] \u003c\/strong\u003e\u003cstrong\u003eSteel (MLS) Construction\u003c\/strong\u003e - Provides smooth edge finish and consistency from batch to batch, ±0.001” manufacturing tolerance\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFolded Stopper Layer to Better Seal the Combustion Chamber\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e.25micron Nitrile Rubber Layer Coating\u003c\/strong\u003e - Reduces chances of leaking on imperfectly smooth mating surfaces over non-coated gasket.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eCompatible with both FA20A (WRX) and FA20B (BRZ, FRS, 86)\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eAccommodates up to 86.5mm bore\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003e0.78mm, 1.05mm, 1.45mm thickness (after crushing)\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eTesting\u003c\/h4\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eGrimmSpeed High Performance Head Gaskets are designed to optimize combustion chamber sealing. This is done by using a unique gasket design feature which sets us apart from the competition. By strategically undercutting the middle layer of the gasket near the combustion chamber, we can control the crushing of outer layers, which in turn creates a perfect seal around the combustion chamber.  \u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eWe can visually demonstrate this feature by using pressure sensitive film and compressing the gasket in a manner which mimics the tightening of a head against the block. The film changes colors from white to pink to red as pressure is applied to denote areas of high and low pressure application. This information will then allow for easy visual verification of effectiveness in sealing of a gasket against a surface.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eAs seen in the results, the combustion chambers are sealed evenly and equally around the circumference of the cylinder by the deep part circles. This visual representation is showing that combustion gasses are going to be held in the chamber and directed towards pushing the piston instead of escaping. Failure of a gasket to seal with even pressure around the circumference of the cylinder would be detrimental for performance and reliability of a gasket and would most certainly result in failure.  \u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eWhen combining the perfect sealing, Nitrile Coating and other features of the gaskets, we are able to ensure that your engine build is ready for anything that you throw at it. From basic engine refreshes to full blown race builds, The Mark of Innovation from GrimmSpeed keeps you in control under pressure.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch4\u003eFitments\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003e15-20 WRX [FA20A]\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e13-20 BRZ\/FRS\/86 [FA20B]\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\u003cstrong\u003e\u003cu\u003e\u003cbr\u003e\u003cbr\u003e\u003c\/u\u003e\u003c\/strong\u003e\u003c\/p\u003e\n","brand":"GrimmSpeed","offers":[{"title":"Default Title","offer_id":41922417623136,"sku":"grm124007","price":209.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1398\/9853\/products\/GrimmSpeed-0_78mm-Head-Gasket-Set-Subaru-WRX-2015-2021-BRZ-FR-S-FT-86-2013-124006.jpg?v=1785327706"},{"product_id":"grimmspeed-head-gasket-set-subaru-sti-04-21-wrx-08-14-fxt-04-08-lgt-05-09-ej25-savcs-1-10mm-ej25bdavcs","title":"GrimmSpeed 1.10mm EJ25B(DAVCS) Head Gasket Set Subaru STI 04-21 \/ WRX 08-14 \/ FXT 04-08 \/ LGT 05-09 | 124004","description":"\u003cp dir=\"ltr\"\u003eGrimmSpeed has set the standard for quality when it comes to aftermarket replacement gaskets so it’s only natural that we should offer our fans the MOST important gaskets their car will ever need: Introducing The GrimmSpeed EJ25 and FA20 Head Gasket Sets!\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eFeature-packed, these gaskets are a perfect fit for any engine build, from basic refresh to a high horsepower track monster.\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eThe GrimmSpeed Head Gaskets feature a multi-layer steel (MLS) construction, in which multiple grades are used to provide optimal surface and combustion chamber sealing as they are torqued down. The top and bottom layers feature a Nitrile Rubberized Coating that helps accommodate a rougher RA surface finish of up to 50microinch. This acts to better seal the non-critical areas of the gasket. \u003c\/span\u003e\u003cspan\u003eIn addition, the gasket edge includes a folded stopper layer that allows for optimal sealing for the combustion chamber. This is done to help reduce the chances of combustion gasses causing head gasket failures under extremely high cylinder pressures that built engines can experience.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eAfter talking to numerous engine builders\/tuners it was clear that creating a variety of gasket thicknesses was key for pairing them with the right build. With that in mind, we’ve made the gaskets available in multiple thicknesses (.78, 1.1, 1.5mm) to help fine tune each individual build. In addition, the slightly oversized bore diameters will allow for up to 0.5mm overbore.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eThe EJ specific gaskets include enlarged center head bolt holes to accommodate up to a 13mm head studs. This is a popular upgrade option for many higher power builds, where additional cylinder head clamping force is needed.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eWe’ve outdone ourselves this time, The GrimmSpeed Head Gaskets carry on the legacy of \u003cstrong\u003equality\u003c\/strong\u003e that you’ve come to know from our other extremely popular gaskets.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch4 dir=\"ltr\"\u003e\u003cspan\u003eQuick Specs\u003c\/span\u003e\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSold as a Set\/Pair - \u003c\/strong\u003eSingle and Dual AVCS fitmentt\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDie Cut Multi-Layer [Stainless] \u003c\/strong\u003e\u003cstrong\u003eSteel (MLS) Construction\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- Provides smooth edge finish and consistency from batch to batch, ±0.001” manufacturing tolerance\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFolded Stopper Layer to Better Seal the Combustion Chamber\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e.25micron Nitrile Rubber Layer Coating\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- Reduces chances of leaking on imperfectly smooth mating surfaces over non-coated gasket.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eAccommodates up to 100.0mm bore\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eCompatible with up to 13mm, ½” studs\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003e0.78mm, 1.1mm and 1.5mm thickness (after crushing)\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4 dir=\"ltr\"\u003eTesting\u003c\/h4\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eGrimmSpeed High Performance Head Gaskets are designed to optimize combustion chamber sealing. This is done by using a unique gasket design feature which sets us apart from the competition. By strategically undercutting the middle layer of the gasket near the combustion chamber, we can control the crushing of outer layers, which in turn creates a perfect seal around the combustion chamber. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eWe can visually demonstrate this feature by using pressure sensitive film and compressing the gasket in a manner which mimics the tightening of a head against the block. The film changes colors from white to pink to red as pressure is applied to denote areas of high and low pressure application. This information will then allow for easy visual verification of effectiveness in sealing of a gasket against a surface.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eAs seen in the results, the combustion chambers are sealed evenly and equally around the circumference of the cylinder by the deep part circles. This visual representation is showing that combustion gasses are going to be held in the chamber and directed towards pushing the piston instead of escaping. Failure of a gasket to seal with even pressure around the circumference of the cylinder would be detrimental for performance and reliability of a gasket and would most certainly result in failure. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eWhen combining the perfect sealing, nitrile coating and other features of the gaskets, we are able to ensure that your engine build is ready for anything that you throw at it. From basic engine refreshes to full blown race builds, The Mark of Innovation from GrimmSpeed keeps you in control under pressure!\u003c\/span\u003e\u003c\/p\u003e\n\u003ch4\u003eFitments\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e04-07 STI [EJ25 SAVCS]\u003c\/li\u003e\n\u003cli\u003e08-14 WRX [EJ25 SAVCS]\u003c\/li\u003e\n\u003cli\u003e04-08 FXT [EJ25 SAVCS]\u003c\/li\u003e\n\u003cli\u003e05-09 LGT [EJ25 SAVCS]\u003c\/li\u003e\n\u003cli\u003e08-21 STI [EJ25B DAVCS]\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cu\u003e\u003cbr\u003e\u003cbr\u003e\u003c\/u\u003e\u003c\/strong\u003e\u003c\/p\u003e","brand":"GrimmSpeed","offers":[{"title":"Default Title","offer_id":41922417655904,"sku":"grm124004","price":146.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1398\/9853\/products\/GrimmSpeed-0_78mm-EJ25SAVCS-Head-Gasket-Set-Subaru-STI-04-21-WRX-08-14-FXT-04-08-LGT-05-09-124000.jpg?v=1785327708"},{"product_id":"grimmspeed-head-gasket-set-subaru-sti-04-21-wrx-08-14-fxt-04-08-lgt-05-09-ej25-savcs-1-50mm-ej25savcs","title":"GrimmSpeed 1.50mm EJ25(SAVCS) Head Gasket Set Subaru STI 04-21 \/ WRX 08-14 \/ FXT 04-08 \/ LGT 05-09 | 124002","description":"\u003cp dir=\"ltr\"\u003eGrimmSpeed has set the standard for quality when it comes to aftermarket replacement gaskets so it’s only natural that we should offer our fans the MOST important gaskets their car will ever need: Introducing The GrimmSpeed EJ25 and FA20 Head Gasket Sets!\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eFeature-packed, these gaskets are a perfect fit for any engine build, from basic refresh to a high horsepower track monster.\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eThe GrimmSpeed Head Gaskets feature a multi-layer steel (MLS) construction, in which multiple grades are used to provide optimal surface and combustion chamber sealing as they are torqued down. The top and bottom layers feature a Nitrile Rubberized Coating that helps accommodate a rougher RA surface finish of up to 50microinch. This acts to better seal the non-critical areas of the gasket. \u003c\/span\u003e\u003cspan\u003eIn addition, the gasket edge includes a folded stopper layer that allows for optimal sealing for the combustion chamber. This is done to help reduce the chances of combustion gasses causing head gasket failures under extremely high cylinder pressures that built engines can experience.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eAfter talking to numerous engine builders\/tuners it was clear that creating a variety of gasket thicknesses was key for pairing them with the right build. With that in mind, we’ve made the gaskets available in multiple thicknesses (.78, 1.1, 1.5mm) to help fine tune each individual build. In addition, the slightly oversized bore diameters will allow for up to 0.5mm overbore.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eThe EJ specific gaskets include enlarged center head bolt holes to accommodate up to a 13mm head studs. This is a popular upgrade option for many higher power builds, where additional cylinder head clamping force is needed.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eWe’ve outdone ourselves this time, The GrimmSpeed Head Gaskets carry on the legacy of \u003cstrong\u003equality\u003c\/strong\u003e that you’ve come to know from our other extremely popular gaskets.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch4 dir=\"ltr\"\u003e\u003cspan\u003eQuick Specs\u003c\/span\u003e\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSold as a Set\/Pair - \u003c\/strong\u003eSingle and Dual AVCS fitmentt\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDie Cut Multi-Layer [Stainless] \u003c\/strong\u003e\u003cstrong\u003eSteel (MLS) Construction\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- Provides smooth edge finish and consistency from batch to batch, ±0.001” manufacturing tolerance\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFolded Stopper Layer to Better Seal the Combustion Chamber\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e.25micron Nitrile Rubber Layer Coating\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- Reduces chances of leaking on imperfectly smooth mating surfaces over non-coated gasket.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eAccommodates up to 100.0mm bore\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eCompatible with up to 13mm, ½” studs\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003e0.78mm, 1.1mm and 1.5mm thickness (after crushing)\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4 dir=\"ltr\"\u003eTesting\u003c\/h4\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eGrimmSpeed High Performance Head Gaskets are designed to optimize combustion chamber sealing. This is done by using a unique gasket design feature which sets us apart from the competition. By strategically undercutting the middle layer of the gasket near the combustion chamber, we can control the crushing of outer layers, which in turn creates a perfect seal around the combustion chamber. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eWe can visually demonstrate this feature by using pressure sensitive film and compressing the gasket in a manner which mimics the tightening of a head against the block. The film changes colors from white to pink to red as pressure is applied to denote areas of high and low pressure application. This information will then allow for easy visual verification of effectiveness in sealing of a gasket against a surface.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eAs seen in the results, the combustion chambers are sealed evenly and equally around the circumference of the cylinder by the deep part circles. This visual representation is showing that combustion gasses are going to be held in the chamber and directed towards pushing the piston instead of escaping. Failure of a gasket to seal with even pressure around the circumference of the cylinder would be detrimental for performance and reliability of a gasket and would most certainly result in failure. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eWhen combining the perfect sealing, nitrile coating and other features of the gaskets, we are able to ensure that your engine build is ready for anything that you throw at it. From basic engine refreshes to full blown race builds, The Mark of Innovation from GrimmSpeed keeps you in control under pressure!\u003c\/span\u003e\u003c\/p\u003e\n\u003ch4\u003eFitments\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e04-07 STI [EJ25 SAVCS]\u003c\/li\u003e\n\u003cli\u003e08-14 WRX [EJ25 SAVCS]\u003c\/li\u003e\n\u003cli\u003e04-08 FXT [EJ25 SAVCS]\u003c\/li\u003e\n\u003cli\u003e05-09 LGT [EJ25 SAVCS]\u003c\/li\u003e\n\u003cli\u003e08-21 STI [EJ25B DAVCS]\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cu\u003e\u003cbr\u003e\u003cbr\u003e\u003c\/u\u003e\u003c\/strong\u003e\u003c\/p\u003e","brand":"GrimmSpeed","offers":[{"title":"Default Title","offer_id":41922417688672,"sku":"grm124002","price":146.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1398\/9853\/products\/GrimmSpeed-0_78mm-EJ25SAVCS-Head-Gasket-Set-Subaru-STI-04-21-WRX-08-14-FXT-04-08-LGT-05-09-124000.jpg?v=1785327708"},{"product_id":"grimmspeed-head-gasket-set-subaru-sti-04-21-wrx-08-14-fxt-04-08-lgt-05-09-ej25-savcs-1-50mm-ej25bdavcs","title":"GrimmSpeed 1.50mm EJ25B(DAVCS) Head Gasket Set Subaru STI 04-21 \/ WRX 08-14 \/ FXT 04-08 \/ LGT 05-09 | 124005","description":"\u003cp dir=\"ltr\"\u003eGrimmSpeed has set the standard for quality when it comes to aftermarket replacement gaskets so it’s only natural that we should offer our fans the MOST important gaskets their car will ever need: Introducing The GrimmSpeed EJ25 and FA20 Head Gasket Sets!\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eFeature-packed, these gaskets are a perfect fit for any engine build, from basic refresh to a high horsepower track monster.\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eThe GrimmSpeed Head Gaskets feature a multi-layer steel (MLS) construction, in which multiple grades are used to provide optimal surface and combustion chamber sealing as they are torqued down. The top and bottom layers feature a Nitrile Rubberized Coating that helps accommodate a rougher RA surface finish of up to 50microinch. This acts to better seal the non-critical areas of the gasket. \u003c\/span\u003e\u003cspan\u003eIn addition, the gasket edge includes a folded stopper layer that allows for optimal sealing for the combustion chamber. This is done to help reduce the chances of combustion gasses causing head gasket failures under extremely high cylinder pressures that built engines can experience.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eAfter talking to numerous engine builders\/tuners it was clear that creating a variety of gasket thicknesses was key for pairing them with the right build. With that in mind, we’ve made the gaskets available in multiple thicknesses (.78, 1.1, 1.5mm) to help fine tune each individual build. In addition, the slightly oversized bore diameters will allow for up to 0.5mm overbore.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eThe EJ specific gaskets include enlarged center head bolt holes to accommodate up to a 13mm head studs. This is a popular upgrade option for many higher power builds, where additional cylinder head clamping force is needed.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eWe’ve outdone ourselves this time, The GrimmSpeed Head Gaskets carry on the legacy of \u003cstrong\u003equality\u003c\/strong\u003e that you’ve come to know from our other extremely popular gaskets.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch4 dir=\"ltr\"\u003e\u003cspan\u003eQuick Specs\u003c\/span\u003e\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSold as a Set\/Pair - \u003c\/strong\u003eSingle and Dual AVCS fitmentt\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDie Cut Multi-Layer [Stainless] \u003c\/strong\u003e\u003cstrong\u003eSteel (MLS) Construction\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- Provides smooth edge finish and consistency from batch to batch, ±0.001” manufacturing tolerance\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFolded Stopper Layer to Better Seal the Combustion Chamber\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e.25micron Nitrile Rubber Layer Coating\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- Reduces chances of leaking on imperfectly smooth mating surfaces over non-coated gasket.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eAccommodates up to 100.0mm bore\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eCompatible with up to 13mm, ½” studs\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003e0.78mm, 1.1mm and 1.5mm thickness (after crushing)\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4 dir=\"ltr\"\u003eTesting\u003c\/h4\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eGrimmSpeed High Performance Head Gaskets are designed to optimize combustion chamber sealing. This is done by using a unique gasket design feature which sets us apart from the competition. By strategically undercutting the middle layer of the gasket near the combustion chamber, we can control the crushing of outer layers, which in turn creates a perfect seal around the combustion chamber. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eWe can visually demonstrate this feature by using pressure sensitive film and compressing the gasket in a manner which mimics the tightening of a head against the block. The film changes colors from white to pink to red as pressure is applied to denote areas of high and low pressure application. This information will then allow for easy visual verification of effectiveness in sealing of a gasket against a surface.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eAs seen in the results, the combustion chambers are sealed evenly and equally around the circumference of the cylinder by the deep part circles. This visual representation is showing that combustion gasses are going to be held in the chamber and directed towards pushing the piston instead of escaping. Failure of a gasket to seal with even pressure around the circumference of the cylinder would be detrimental for performance and reliability of a gasket and would most certainly result in failure. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eWhen combining the perfect sealing, nitrile coating and other features of the gaskets, we are able to ensure that your engine build is ready for anything that you throw at it. From basic engine refreshes to full blown race builds, The Mark of Innovation from GrimmSpeed keeps you in control under pressure!\u003c\/span\u003e\u003c\/p\u003e\n\u003ch4\u003eFitments\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e04-07 STI [EJ25 SAVCS]\u003c\/li\u003e\n\u003cli\u003e08-14 WRX [EJ25 SAVCS]\u003c\/li\u003e\n\u003cli\u003e04-08 FXT [EJ25 SAVCS]\u003c\/li\u003e\n\u003cli\u003e05-09 LGT [EJ25 SAVCS]\u003c\/li\u003e\n\u003cli\u003e08-21 STI [EJ25B DAVCS]\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cu\u003e\u003cbr\u003e\u003cbr\u003e\u003c\/u\u003e\u003c\/strong\u003e\u003c\/p\u003e","brand":"GrimmSpeed","offers":[{"title":"Default Title","offer_id":41922417721440,"sku":"grm124005","price":146.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1398\/9853\/products\/GrimmSpeed-0_78mm-EJ25SAVCS-Head-Gasket-Set-Subaru-STI-04-21-WRX-08-14-FXT-04-08-LGT-05-09-124000.jpg?v=1785327708"},{"product_id":"grimmspeed-head-gasket-set-subaru-sti-04-21-wrx-08-14-fxt-04-08-lgt-05-09-ej25-savcs-0-78mm-ej25bdavcs","title":"GrimmSpeed 0.78mm EJ25B(DAVCS) Head Gasket Set Subaru STI 04-21 \/ WRX 08-14 \/ FXT 04-08 \/ LGT 05-09 | 124003","description":"\u003cp dir=\"ltr\"\u003eGrimmSpeed has set the standard for quality when it comes to aftermarket replacement gaskets so it’s only natural that we should offer our fans the MOST important gaskets their car will ever need: Introducing The GrimmSpeed EJ25 and FA20 Head Gasket Sets!\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eFeature-packed, these gaskets are a perfect fit for any engine build, from basic refresh to a high horsepower track monster.\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eThe GrimmSpeed Head Gaskets feature a multi-layer steel (MLS) construction, in which multiple grades are used to provide optimal surface and combustion chamber sealing as they are torqued down. The top and bottom layers feature a Nitrile Rubberized Coating that helps accommodate a rougher RA surface finish of up to 50microinch. This acts to better seal the non-critical areas of the gasket. \u003c\/span\u003e\u003cspan\u003eIn addition, the gasket edge includes a folded stopper layer that allows for optimal sealing for the combustion chamber. This is done to help reduce the chances of combustion gasses causing head gasket failures under extremely high cylinder pressures that built engines can experience.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eAfter talking to numerous engine builders\/tuners it was clear that creating a variety of gasket thicknesses was key for pairing them with the right build. With that in mind, we’ve made the gaskets available in multiple thicknesses (.78, 1.1, 1.5mm) to help fine tune each individual build. In addition, the slightly oversized bore diameters will allow for up to 0.5mm overbore.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eThe EJ specific gaskets include enlarged center head bolt holes to accommodate up to a 13mm head studs. This is a popular upgrade option for many higher power builds, where additional cylinder head clamping force is needed.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eWe’ve outdone ourselves this time, The GrimmSpeed Head Gaskets carry on the legacy of \u003cstrong\u003equality\u003c\/strong\u003e that you’ve come to know from our other extremely popular gaskets.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch4 dir=\"ltr\"\u003e\u003cspan\u003eQuick Specs\u003c\/span\u003e\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSold as a Set\/Pair - \u003c\/strong\u003eSingle and Dual AVCS fitmentt\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDie Cut Multi-Layer [Stainless] \u003c\/strong\u003e\u003cstrong\u003eSteel (MLS) Construction\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- Provides smooth edge finish and consistency from batch to batch, ±0.001” manufacturing tolerance\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFolded Stopper Layer to Better Seal the Combustion Chamber\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e.25micron Nitrile Rubber Layer Coating\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- Reduces chances of leaking on imperfectly smooth mating surfaces over non-coated gasket.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eAccommodates up to 100.0mm bore\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eCompatible with up to 13mm, ½” studs\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003e0.78mm, 1.1mm and 1.5mm thickness (after crushing)\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4 dir=\"ltr\"\u003eTesting\u003c\/h4\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eGrimmSpeed High Performance Head Gaskets are designed to optimize combustion chamber sealing. This is done by using a unique gasket design feature which sets us apart from the competition. By strategically undercutting the middle layer of the gasket near the combustion chamber, we can control the crushing of outer layers, which in turn creates a perfect seal around the combustion chamber. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eWe can visually demonstrate this feature by using pressure sensitive film and compressing the gasket in a manner which mimics the tightening of a head against the block. The film changes colors from white to pink to red as pressure is applied to denote areas of high and low pressure application. This information will then allow for easy visual verification of effectiveness in sealing of a gasket against a surface.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eAs seen in the results, the combustion chambers are sealed evenly and equally around the circumference of the cylinder by the deep part circles. This visual representation is showing that combustion gasses are going to be held in the chamber and directed towards pushing the piston instead of escaping. Failure of a gasket to seal with even pressure around the circumference of the cylinder would be detrimental for performance and reliability of a gasket and would most certainly result in failure. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eWhen combining the perfect sealing, nitrile coating and other features of the gaskets, we are able to ensure that your engine build is ready for anything that you throw at it. From basic engine refreshes to full blown race builds, The Mark of Innovation from GrimmSpeed keeps you in control under pressure!\u003c\/span\u003e\u003c\/p\u003e\n\u003ch4\u003eFitments\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e04-07 STI [EJ25 SAVCS]\u003c\/li\u003e\n\u003cli\u003e08-14 WRX [EJ25 SAVCS]\u003c\/li\u003e\n\u003cli\u003e04-08 FXT [EJ25 SAVCS]\u003c\/li\u003e\n\u003cli\u003e05-09 LGT [EJ25 SAVCS]\u003c\/li\u003e\n\u003cli\u003e08-21 STI [EJ25B DAVCS]\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cu\u003e\u003cbr\u003e\u003cbr\u003e\u003c\/u\u003e\u003c\/strong\u003e\u003c\/p\u003e","brand":"GrimmSpeed","offers":[{"title":"Default Title","offer_id":41922417786976,"sku":"grm124003","price":146.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1398\/9853\/products\/GrimmSpeed-0_78mm-EJ25SAVCS-Head-Gasket-Set-Subaru-STI-04-21-WRX-08-14-FXT-04-08-LGT-05-09-124000.jpg?v=1785327708"}],"url":"https:\/\/www.importimageracing.com\/collections\/grimmspeed-engine-head-gaskets.oembed","provider":"Import Image Racing","version":"1.0","type":"link"}