Perrin - Subaru 02-07 WRX/STI - Air Oil Separator (Neon Yellow) subaru-ascent-2019 Includes both swivel and mount

Includes both swivel and mount

As standard practice

which translates into a smooth powerband

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 Includes both swivel and mountOVERVIEW 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