Perrin - Subaru 08-14 WRX/STI - Air Oil Separator (Red) subaru-wrx-2025 The solution is the Mishimoto

The solution is the Mishimoto direct-fit top-mount intercooler engineered specifically for the 2008–2019 Subaru WRX STI

Replacing the factory main pulley

Subaru 02-14 WRX (*may require additional parts)

the denser the air becomes and that’s what helps eliminate pre-detonation

Perrin - Subaru 08-14 WRX/STI - Air Oil Separator (Red) subaru-wrx-2025 The solution is the MishimotoOVERVIEW 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