IAG V3 Street Series Air / Oil Separator (AOS) in Neon Yellow for 2006-07 Subaru Impreza WRX & 2004-07 STI. 2016-subaru-wrx sti-limited the OEM guides are pressed

the OEM guides are pressed out and replaced with GSC Manganese-Bronze valve guides that are shaped to improve airflow

and unique

0 Valve Guide and Seat Machine to cut all intake and exhaust seats with a multi-angle valve job that suits the flow characteristics of GSC's +1mm valves

The IAG AOS pitch mount bracket fits the 2006-07 Subaru Impreza WRX and 2004-07 STI as well as 2004-08 Forester XT

It is well suited for both lowered street cars as well as off-road rally cars

IAG V3 Street Series Air / Oil Separator (AOS) in Neon Yellow for 2006-07 Subaru Impreza WRX & 2004-07 STI. 2016-subaru-wrx sti-limited the OEM guides are pressedIAG V3 Street Series AOS (Neon Yellow) The IAG Performance V3 Street Series Air Oil separator (AOS) is an excellent investment to keep your Subaru vehicle running well. The Street Series AOS maintains OEM PCV system functionality, but supplements its capacity. The Street Series AOS design is based on years of extensive testing on standard and competition applications. The Street Series AOS' large, 1 liter, cast aluminum swirl pot canister more