With all the benefits of Bailey's piston design, but with less audible 'whoosh', the DV30 piston re-circulating dump valve was originally designed as a direct replacement for the factory fitted Bosch dump valve found on a wide variety of cars. The Bosch valve is made of plastic, contains a rubber diaphragm and is known to fail when subjected to too much boost pressure or excessive temperatures. The DV30 Dump Valve, is the perfect choice for a standard car or fire-breathing 550+ bhp tuned vehicle, capable of withstanding huge amounts of boost with its high temperature piston internals and CNC machined body. As the DV30 Bailey dump valve is designed to direct the dumped boost back into the air filter or airstream, it is generally speaking 'silent' in operation and can alleviate any annoying 'fluttering' noises in many Bosch equipped applications. It is also possible to retro-fit the DV30 onto a wide variety of cars.
The DV30 valve is considered an essential upgrade for any vehicle with the VW/Audi 20v 1.8 turbo engine and fits all models listed below. This dump valve is a direct replacement for the following vehicles and generally requires no fitting kit (some vehicles may require new hose clips):
AUDI
S2 Quattro
TT 1.8 20v Turbo (185/225 bhp models)
A3/S3 1.8 20v Turbo
A4 1.8 20v Turbo
S4 2.7 30v Twin Turbo (2 valves)
FIAT
Uno Turbo Mk1/Mk2
Punto GT
Coupe 16v/20v
FORD
Sierra/Escort Cosworth 2wd/4wd
Focus RS
LANCIA
Delta incl. HF & Integrale 8v/16v
MASERATI
Most Bi-Turbo models
PEUGEOT
406 Sri Turbo 8v
PORSCHE
911/944 Turbo
RENAULT
21 Turbo
GTA V6
SAAB
Most 900/9000 models
SEAT
Leon 1.8 20v incl. Cupra
VOLVO
440/480/740 Turbo
VOLKSWAGEN
Golf Mk4 1.8 20v Turbo
Passat Mk4 1.8 20v Turbo