Perrin Black Air Oil Separator WRX/STI w/ TMIC 2002-2007 | PSP-ENG-605BK High-Performance Shocks more finished appearance

more finished appearance

Durable Build: Made with high-quality materials for long-lasting performance

or occasional track sessions

making it an essential part of a clean and efficient turbo conversion

Adjustable speed & brightness

Perrin Black Air Oil Separator WRX/STI w/ TMIC 2002-2007 | PSP-ENG-605BK High-Performance Shocks more finished appearanceThe 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