GrimmSpeed Phenolic Thermal Spacer 3mm - WRX 2002-2014 / STI 2004-2018 / More
Do you know what your intake manifold sits on?...a superheated boxer engine. If you don't know already, the cooler your intake air is the more HP your car will achieve. GrimmSpeed has presented you the answer to this age old problem, raising the intake manifold off the engine with their new real Phenolic Intake Manifold/TGV to Engine Thermal Spacer.
Availability date: 09/19/2013
What it does:
How it works:
Temperature Testing Data: Testing at 1/2 hour intervals. All testing was conducted fairly in Fahrenheit measurements on ONE day at a consistent outside temperature.
Test #1 - OEM measurement from IM without spacers, 152 degrees.
Test #2 - with 3mm phenolic spacers the temp dropped to 134 Degrees
That is an OVER 18 Degree drop with the largest phenolic spacers!
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