{"product_id":"subaru-oem-shortblock-17-20-brz-6-spd-fa20-10103ac840","title":"Subaru OEM Short Block BRZ 2017-2020 | 10103AC840","description":"\u003ch2\u003eOverview\u003c\/h2\u003e\n\u003cp\u003eThe Genuine Subaru OEM Short Block Assembly (Part #10103AC840) is the factory-spec engine foundation for the 2017–2020 Subaru BRZ equipped with the FA20 boxer engine and 6-speed manual transmission. Engineered to exact OEM tolerances, this short block delivers the reliability and precision of a brand-new Subaru factory unit — making it the ideal solution for engine rebuilds, replacements, or high-damage repairs where rotating assembly integrity is critical.\u003c\/p\u003e\n\n\u003ch2\u003eKey Features \u0026amp; Benefits\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eGenuine Subaru OEM Part\u003c\/strong\u003e — Built to factory specifications, ensuring exact fitment and performance matching your original BRZ drivetrain.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eComplete Short Block Assembly\u003c\/strong\u003e — Includes the engine block, crankshaft, pistons, connecting rods, and bearings — eliminating guesswork on component compatibility.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFA20 Boxer Architecture\u003c\/strong\u003e — Subaru's horizontally opposed four-cylinder design for a lower center of gravity, improved handling balance, and the distinctive BRZ driving character.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFactory Tolerances \u0026amp; Machining\u003c\/strong\u003e — Block bores, crankshaft journals, and bearing surfaces are machined to OEM spec right from the factory — no additional machining required for a stock rebuild.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBacked by Subaru Quality Standards\u003c\/strong\u003e — As a genuine OEM assembly, this short block meets the same quality control benchmarks as the engine in a new Subaru vehicle.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCorrect for 6-Speed Manual Applications\u003c\/strong\u003e — Specifically designated for BRZ models paired with the 6-speed manual transmission, ensuring compatibility with the correct engine balancing and ancillary mounts.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWhat's Included\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e1x Genuine Subaru OEM Short Block Assembly (Engine Block with Rotating Assembly)\u003c\/li\u003e\n\u003cli\u003eCrankshaft, Pistons, Connecting Rods, and Main\/Rod Bearings (as assembled at the factory)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003eNote: Cylinder head(s), valve train components, intake\/exhaust manifolds, and ancillary accessories are NOT included. This is a short block only.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eSubaru Part Number\u003c\/th\u003e\n\u003ctd\u003e10103AC840\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eEngine Family\u003c\/th\u003e\n\u003ctd\u003eFA20 Horizontally Opposed (Boxer) 4-Cylinder\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eDisplacement\u003c\/th\u003e\n\u003ctd\u003e2.0L (1998cc)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eAssembly Type\u003c\/th\u003e\n\u003ctd\u003eShort Block (Block + Rotating Assembly)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTransmission Compatibility\u003c\/th\u003e\n\u003ctd\u003e6-Speed Manual\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOEM \/ Aftermarket\u003c\/th\u003e\n\u003ctd\u003eGenuine Subaru OEM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCondition\u003c\/th\u003e\n\u003ctd\u003eNew\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eFitment \u0026amp; Compatibility\u003c\/h2\u003e\n\u003cp\u003eThis Genuine Subaru short block is compatible with the following vehicles:\u003c\/p\u003e\n\u003cp\u003e2017-2020 Subaru BRZ\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eImportant:\u003c\/strong\u003e Verify your vehicle's engine code, model year, and transmission type before ordering. This short block is specifically calibrated for 6-speed manual BRZ applications. Automatic transmission variants may require a different part number.\u003c\/p\u003e\n\n\u003ch2\u003eInstallation\u003c\/h2\u003e\n\u003cp\u003eShort block replacement is an advanced mechanical procedure requiring professional-level engine assembly experience. Installation should be performed by a qualified Subaru technician or experienced engine builder. A proper engine rebuild includes replacement of all gaskets, seals, oil pump, and coolant passages — components not included with this short block. Refer to the Subaru FA20 factory service manual for torque specifications, assembly sequences, and clearance measurements. Break-in procedures per Subaru factory guidelines should be followed upon first start-up.\u003c\/p\u003e","brand":"Subaru OEM","offers":[{"title":"Default Title","offer_id":50513227874400,"sku":"sub10103AC840","price":2637.74,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1398\/9853\/files\/Subaru-OEM-Short-Block-BRZ-2017-2020-10103AC840.png?v=1793218785","url":"https:\/\/www.importimageracing.com\/products\/subaru-oem-shortblock-17-20-brz-6-spd-fa20-10103ac840","provider":"Import Image Racing","version":"1.0","type":"link"}