Dump Valves
Why use a dump valve (or blow-off valve)?
Used on turbocharged gasoline engines, the dump valve is a mechanical part installed on the intake pipe which reduces lag when you open the throttle again and improves the reliability of the turbo.
When we step on the gaz pedal, the turbo compresses the air and discharges it through the intake to supply the cylinders. When we release the pedal, the throttle plate closes but the turbo continues to spin due to its inertia and generates excess pressure. This can cause harmful back pressure which can reverse the rotation of the compressor and turbine.
The main purpose of the dump valve is therefore to release this excess pressure to protect the turbo and improve its response. There are bypass valves (closed loop operation) which discreetly vent air back to the intake manifold, and vent-to-atmosphere blow-off valves (open loop) which discharge it directly into the engine compartment by making the famous "whoosh" noise.
Depending on the products, we can find membrane dump valves suitable for stock pressures and single piston or double piston models designed for larger boost setups.
5 in stock
HKS Super SQV IV Blow Off Valve - Silver
4 in stock
HKS Super SQV IV Blow Off Valve - Black Edition
16 in stock
40+ in stock
1 in stock
3 in stock
1 in stock
1 in stock
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HKS Super SQV IV Blow Off Valve for BMW 135i & 335i
2 in stock
2 in stock
1 in stock
2 in stock
2 in stock
in stock
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19 in stock
Aluminium Connection Pipe for GReddy Dump Valve (Flange)
40+ in stock
Aluminium Connection Pipe for HKS Dump Valve (Flange)
7 in stock
4 in stock
4 in stock
HKS Purple Super SQV Special Fin "Low Frequency" - Purple
23 in stock
Universal HKS SSQV Flange 25 mm
2 in stock
2 in stock
25 in stock
HKS SSQV Replacement O-Ring & C-Ring Set
4 in stock
HKS Super SSQV Universal Flange - Aluminium 60 mm
3 in stock
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HKS Super SQV IV Blow Off Valve for Renault Megane 2 RS
Universal or specific dump valve, we have the one you need!
DriftShop markets a wide range of HKS, GReddy and Turbosmart dump valves, universal type or specifically designed for a vehicle, from light tune to the most extreme mod.
As a supercharging specialist, HKS has conquered the planet with its legendary SSQV, available in a version suitable for all turbo engines or specially produced for a particular model. Another Japanese manufacturer, GReddy is not left out with its very high quality, extremely quick and reliable FV. The Australians of Turbosmart, for their part, developed recirculating and atmospheric models or a mix of the two types for powers up to 2500 hp!
You will also find on this page accessories and spare parts to enhance your setup, such as flanges, connection pipes, fins, gaskets or even adapters.