BOV Kompact PlumBack - ShortieKompact Valve from Turbsomart was developed to take the Motorsport Proven 28mm, Postiive Sealing Piston Valve Technology and adapt it to the smaller footprint of the compressor cover mounted bypass valves as found on common Borgwarner EFR and KKK Turbochargers as well as many Ford Ecoboost Engines. The Kompact Valve is a bolt on, direct repalcement for the factory and OE plastic diverter valves that use un enforced diahgrams and are known to crack