GrimmSpeed 8mm Phenolic Thermal Spacers Subaru Impreza 1999-2001 / Legacy 00-04 | 017001

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SKU: grm017001
Availability: Out Of Stock
Type: Gaskets and Hardware
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Regular Price: $79.00 - Instant discount: $11.85 = $67.15
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Subtotal: $67.15

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Fitment Information:

1999-2001 Subaru Impreza

2000-2004 Subaru Legacy


In case you weren't aware, the cooler your intake air is the more HP your car will achieve. One way to reduce intake air temperatures is to raise the intake manifold off the engine with GrimmSpeed's Phenolic Intake-Manifold-to-Engine Thermal Spacers. Phenolic spacers have been used for years by many other specialized automotive companies, but GrimmSpeed is one of the first to offer this technology to the Subaru world.

  • Thickness: 8mm
  • Greatly reduce the transfer of heat from engine to intake manifold thus reducing its temperature and heat soak
  • One of a kind true Phenolic material, not cutting board material like others
  • Cooler intake temperature = denser air = more power
  • The cooler and denser the intake air is, the more air that can be mixed with fuel thus increasing efficiency
  • Every 5° reduction in air temperature increases power by 1%
  • Direct bolt-on
  • Made in the USA
  • Sold as a pair

It is recommended to use one OEM intake manifold gasket on each side of these GrimmSpeed spacers to allow for proper sealing. Gaskets are available to purchase separately.

California Prop 65 Warning:
 Operating, servicing and maintaining a passenger vehicle or off-highway motor vehicle can expose you to chemicals including engine exhaust, carbon monoxide, phthalates, and lead, which are known to the State of California to cause cancer and birth defects or other reproductive harm. To minimize exposure, avoid breathing exhaust, do not idle the engine except as necessary, service your vehicle in a well-ventilated area and wear gloves or wash your hands frequently when servicing your vehicle. For more information go to