Kompact VAG V2 Plumb Back has been specifically to suit the 2.0L VAG engine Unlike the standard, plastic valves that use un-reinforced diaphragms and are known to crack under increased boost, the new Kompact VAG V2 Plumb Back uses O-Ring sealed piston which, coupled with it's billet aluminium construction give it over 30PSI boost handling capability. Included with each Kompact VAG V2 Plumb Back kit: Model specific valve, Mounting screws and Spring clamps.