Perrin - Subaru 02-07 WRX/STI - Air Oil Separator (Neon Yellow) subaru-ascent-2019 The Mishimoto Silicone Ancillary Hose

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

The included billet turbo adapter and 5-ply silicone make for a straightforward and leak-free installation and are compatible with both the factory bypass valve and COBB LF BPV

Subaru 04 STI

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

68 AHR Firewall Bushing (Rear)

Perrin - Subaru 02-07 WRX/STI - Air Oil Separator (Neon Yellow) subaru-ascent-2019 The Mishimoto Silicone Ancillary HoseOVERVIEW 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