Perrin - Subaru 02-07 WRX/STI - Air Oil Separator (Neon Yellow) subaru-ascent-2019 these inlet and outlet sizes

these inlet and outlet sizes were chosen to ensure the perfect balance of flow and to maintain the boost in your system

The Mishimoto Silicone Ancillary Hose Kit for the 2015+ Subaru WRX is designed to improve the reliability of your vehicle and eliminate weak points found with the factory rubber hoses

Includes both swivel and mount

showing a 12°F temperature drop as well as a +6 whp and +8 wtq bolt-on power increase for our stock test vehicle

Perrin - Subaru 02-07 WRX/STI - Air Oil Separator (Neon Yellow) subaru-ascent-2019 these inlet and outlet sizesOVERVIEW 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