This center cap only fits: JR14 (15-16")

Either if it’s needed to maintain speed with high lock angles in drifting

14 PSI Outer: TS-0600-2009

These improvements can be amplified with higher base pressures

Turbosmart's Kompact offers big blow-off valve performance in a small package

Kompact Shortie Plumb Back - VR08 CVR9 This center cap only fits:The Kompact Shortie Blow Off Valve for the Focus RS has been developed with the Focus's high boost pressure in mind, with the goal to improve performance and durability. Plastic OEM blow off valves like those on the RS have a track record of failures they leak, and they become brittle with age until they eventually crack, causing serious problems. Producing around 23 PSI of boost pressure in standard form, the Focus is already pushing the boundaries