Perrin Air Oil Separator for TMIC Black WRX (2008-2014) STI (2008-2018) BMW By adding a significantly a

By adding a significantly a stiffer rear sway bar

and eliminates the "double-clunk" when shifting gears into 2nd

R59 2012-up Roadster Cooper S and JCW

Each clamp is stamped with the PERRIN logo

The "Standard" version sacrifices some comfort for reduced deflection and increased noise

Perrin Air Oil Separator for TMIC Black WRX (2008-2014) STI (2008-2018) BMW By adding a significantly aPerrin Air Oil Separators for the WRX STI are a great product if you want to increase your intercooler efficiency and stopping oil from entering the intake. By reducing the amount of oil that is entering the intercooler and intake system you will have a cleaner more efficient motor and less engine damaging detonation. The Air Oil separator is a great item to have on highly used daily driven cars or complete race cars. Black or red the AOS are a clean