Perrin - Subaru 08-14 WRX/STI - Air Oil Separator (Neon Yellow) subaru-ascent-2020 most flexible ECU upgrade solution

most flexible ECU upgrade solution coupled with COBB's SF Intake System makes up the COBB Stage 1+ Power Package for your Subaru Legacy or Outback

Will support vehicles with up to 350 hp

black hose fittings

The main concept of MONO SPORT is to provide driving pleasures to all drivers

Perrin - Subaru 08-14 WRX/STI - Air Oil Separator (Neon Yellow) subaru-ascent-2020 most flexible ECU upgrade solutionOVERVIEW 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