Perrin - Subaru 02-07 WRX/STI - Air Oil Separator (Red) subaru-ascent-2024 High quality 0

High quality 0

Larger Piston Diameter (22mm O

whereas triples are all solid discs and not recommended for street use

Group 24 OEM Automotive Case size (directly replace stock battery)

Twin-tube structure

Perrin - Subaru 02-07 WRX/STI - Air Oil Separator (Red) subaru-ascent-2024 High quality 0OVERVIEW The PERRIN Air Oil Separator traps oil from the crankcase vents before it enters the intake, reduces carbon build up, increases intercooler efficiency, which reduces the chance of performance robbing detonation. NO TUNING REQUIRED Increase horsepower and torque without ECU recalibration or tune! This part is designed and tested to work safely on your vehicle without any tuning required! However, more power can be gained with proper ECU