Perrin Black Air Oil Separator WRX/STI w/ TMIC 2002-2007 | PSP-ENG-605BK High-Performance Shocks and a clean aggressive stance

and a clean aggressive stance

Height: 42mm / 1

Hose clamps

3 years of warranty with professional installation

It’s not just peak numbers either—you see the DC Sports cold air intake carry improvements through the mid-range where you actually drive

Perrin Black Air Oil Separator WRX/STI w/ TMIC 2002-2007 | PSP-ENG-605BK High-Performance Shocks and a clean aggressive stanceThe 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