A Forge Motorsport Blow-Off/Dump Valve is designed to be an upgrade to the factory turbo setup. Capable of dealing with higher boost pressures and is more reliably designed, making it ideal for high-performance tuned or re-mapped engines. Silicone hose replaces the weaker plastic OEM boost pipe that can deteriorate over time.CNC machined twin-piston valve design helps the turbocharger maintain rotational speed ready for accelerating while reducing the strain on the turbo impeller, prolonging turbo life.Reduces the risk of premature turbo failure on re-mapped engines and modified vehicles.Awesome atmospheric blow-off noiseIncludes all necessary fittings and instructions for a simple installation.includes a boost pipe adaptor for the option of fitting an external boost gauge with a simple t-piece.When you come off the throttle on a turbocharged car the built-up charge of pressurised air has to go somewhere. If it can't, or if the air isn't released quickly enough then the turbo will slow