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improved alignment
Origin: Made in Taiwan
Verify Compatibility: Confirm fitment for your specific year and model before purchase
The turbocharger is one of the hottest parts of your engine bay—and that heat can quickly hurt performance
GrimmSpeed Air Oil Separator Red 02-07 WRX / 04-21 STI / 04-08 Forester XT / 04-06 Subaru Baja XT Exclusive Products -2008-2014 WRX/STI improved alignmentImprove your Subarus performance with the GrimmSpeed Air Oil Separator Red, designed specifically for 2002 2021 Subaru WRX STI, Forester XT, and Baja XT models. This premium AOS prevents oil from entering your intake system, ensuring cleaner combustion, better fuel efficiency, and reduced engine maintenance. Its the ideal upgrade for enthusiasts seeking reliable, long term protection without compromising factory PCV function. Crafted from fully
