Specifically designed to suit the latest turbocharged BMW cars, the Kompact BMW Kit consists of two Kompact plumb back valves and all the necessary hoses and clamps. The Kompact BMW Kit is a performance bolt-on replacement for the factory plastic bypass valves offering greater boost response and no leaks. Easy to install and set up, the Kompact BMW Kit is an ideal performance upgrade for the current model N54 twin-turbo BMWs. (Z4 models require additional pipe kit TS-0203-2001).