The Turbosmart Kompact Dual Port kit for BMW N54 twin-turbo 3.0L cars (135i, 335i, 535i, Z4) replaces factory plastic diverter valves with a billet aluminum boost-balance valve. Dual-port operation vents both to atmosphere and recirculates to the intake with sequential timing for quieter normal driving yet full vent-to-atmosphere benefits under race conditions, improving reliability and response over the OEM unit.
Turbosmart BMW 135i/335i/535i/Z4 w/ N54 Twin Turbo 3.0L Kompact Dual Port Kit