Malpassi Adjustable Twin Piston Atmospheric Dump Valve Silver

A Malpassi Adjustable Twin Piston Atmospheric Dump Valve has been designed to be an upgrade to the factory valve. Capable of dealing with higher boost pressures and is more reliably designed, meaning you can enjoy your reduced turbo lag for far longer.Uprated for higher boost pressuresReplace failure-prone factory valvesOption of atmospheric blow-off noiseWhen you come off the throttle on a turbocharged car, the built-up charge of pressurised air must go somewhere. If it can't, or if the air isn't released quickly enough then the turbo will slow down or even stall leading to a delay getting back on boost when you get back on the throttle.This is where a dump valve comes in. It releases the built-up pressure. Most cars have a dump valve of some sort fitted from the factory. This will have been tuned for the factory tune and boost levels though. In many cars, a soft flexible diaphragm is part of the valve, and these wear out. Once the valve is leaking it can cause problems with how the engine functions.For some vehicles, Malpassi offers a choice of recirculating dump valves and atmospheric dump valves. A recirculating valve is what most cars come fitted with from the factory. It discretely recirculates excess air back into the inlet. While there will be no extra noise, the valve will be compatible with increased boost pressure. On the other hand, an atmospheric valve vents the built-up pressure into the atmosphere, giving that distinctive whoosh sound. Many modern engines have problems when you switch from recirculating to venting to the atmosphere. Malpassi has, for selected vehicles, engineered a complete solution to try and get around this. This means you can enjoy the sporty blow-off valve noise on a wider range of cars than ever. For many of us, that noise is all part of the fun of a turbocharged car!Please carefully check the title to see what type of valve is selected. A recirculating valve will not make the distinctive "blow-off" valve noise.SpecificationsStandard Range: - 0.5-1.2 BarUprated Spring Range: - 1.3-3.0 Bar (Supplied in the box)Size Range: - 20, 25, 34mm