Specifically designed to suit the latest turbocharged BMW cars, the KompactBMW Kit consists of two Plumb Back Kompact 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 N54-engined twin-turbo BMWs (Z4 models require additional pipe kit TS-0203-2001).