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

Over time the factory hoses become brittle and crack

The design incorporates cooling fins to aid in dissipating heat from the oil as air passes over them

4-ply Steel Reinforced Silicone Post-MAF

Installation is a breeze with the included hardware

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