Perrin [02-14 WRX, 04-21 STI, 05-09 LGT] Air Oil Separator Neon Yellow w/ FMIC Performance Aero Parts This enhances the overall appearance

This enhances the overall appearance of the vehicle while also conveying a sense of performance and athleticism

Heavy-duty 57mm twin-tube construction for durability and fade-free performance

Designed for performance and swapped applications

these coilovers allow you to fine-tune both compression and rebound through a single

Cast flanges provide precision fitment and durability

Perrin [02-14 WRX, 04-21 STI, 05-09 LGT] Air Oil Separator Neon Yellow w/ FMIC Performance Aero Parts This enhances the overall 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