Perrin [02-07 WRX/STI w/ TMIC] Red Air Oil Separator | PSP-ENG-605RD Lightweight Boost the performance and sound

Boost the performance and sound of your 2009-2014 Dodge Challenger 5

Spring Rates: Front – 12kgf/mm | Rear – 7

Direct-fit design for M177 engines

Mitsubishi Lancer Evolution IX 2005-2007

tackling twisty roads

Perrin [02-07 WRX/STI w/ TMIC] Red Air Oil Separator | PSP-ENG-605RD Lightweight Boost the performance and soundThe 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 being transferred away from your engine. This leads to power loss and detonation, which can be damaging to your engine. Reduce carbon build up in the combustion chamber, intake valves, and in your intake tract. Crank case blow by is