Perrin 08-14 Subaru WRX/STI Red Air Oil Seperator - paPSP-ENG-606RD import_2022_03_21_012537 Inefficient factory blow off valves

Inefficient factory blow off valves (BOV) can hinder boost response during shifts and can damage your expensive turbo charger

*3" Downpipe* Our downpipe features a wastegate dump tube to recirculate exhaust gases back into the exhaust system

* The PERRIN turbo heat shield is perfect for those not wanting to cut the OEM turbo heat shield when installing our PERRIN down pipe

PartNumber : acl5M1959HX-STD Description : Main Bearings

Perrin 08-14 Subaru WRX/STI Red Air Oil Seperator - paPSP-ENG-606RD import_2022_03_21_012537 Inefficient factory blow off valvesThe PERRIN Performance Air Oil Separator traps oil from the crank case vents before it enters the intake, thus increasing intercooler efficiency and reduces chances of performance robbing detonation. *Increase Intercooler Efficiency* The AOS increases intercooler efficiency by reducing the amount of oil deposited into your intercooler and intake system! As blow by oil builds up inside your intercooler, the less efficient it becomes due to less heat