IAG Performance Air/Oil Separator (AOS) Competition To Street Conversion Kit - Subaru STI 04-20, WRX 06-14 Up Pipe If you don't already have

If you don't already have a set of PERRIN Boost Tubes

Fiber Friction lined disc

IAG's / ARP 14mm Head Stud Set is designed for use on high horsepower Subaru engines

Provides an aggressive exhaust note

The gaskets include a proprietary four step coating process after embossing which features a silicone coat for improved sealing properties

IAG Performance Air/Oil Separator (AOS) Competition To Street Conversion Kit - Subaru STI 04-20, WRX 06-14 Up Pipe If you don't already haveAG Performance Air Oil Separator Competition to Street Series Conversion Kit. This particular kit has been designed to switch the upper breather portion of the Competition Series AOS to the Street Series AOS. Details: (1) IAG Street Series Air Oil Separator upper breather port (1) Upper breather port O ring (1) M4 x 8mm socket head screw (1) 1 2" hose that is 39" in length (1) 3 8" hose that is 27" in length with PCV valve and breather fitting (1) 1