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.
9 in stock
HKS Super SQV IV Blow Off Valve - Silver
11 in stock
HKS Super SQV IV Blow Off Valve - Black Edition
18 in stock
31 in stock
GReddy FV2 Dump Valve - Universal
4 in stock
1 in stock
GReddy FV2 Blow Off Valve Kit for Nissan GT-R
3 in stock
1 in stock
in stock
HKS Super SQV IV Blow Off Valve for BMW 135i & 335i
6 in stock
GReddy FV2 Blow Off Valve Kit for Mitsubishi Lancer Evo 8 (VIII)
6 in stock
GReddy FV2 Blow Off Valve Kit for Mitsubishi Lancer Evo 9 (IX)
3 in stock
GReddy FV2 Black Blow Off Valve Kit for Mitsubishi Lancer Evo 10 (X)
5 in stock
GReddy FV2 Black Blow Off Valve Kit for Subaru Impreza WRX STI GD (02-07)
2 in stock
GReddy FV2 Black Blow Off Valve Kit for Subaru Impreza WRX STI GRB (07-14)
in stock
Turbosmart "Plumb Back" Recirculation Dump Valve (Universal)
in stock
in stock
in stock
in stock
in stock
Turbosmart "EM Dual Port" Dump Valve
in stock
3 in stock
Turbosmart "Kompact Dual Port" Dump Valve for Subaru Impreza WRX/STI (01-07)
Turbosmart "Kompact Shortie Plumb Back" Recirculation Dump Valve for Suzuki Swift ZC33S (2017+)
Turbosmart "Kompact Shortie Plumb Back" Recirculation Dump Valve for VAG 2.0L TS/TFSI
Turbosmart "Kompact Dual Port" Dump Valve for Suzuki Swift ZC33S (2017+)
Turbosmart "Kompact EM Dual Port" Dump Valve VR10 for Peugeot, Citroen, DS 1.6 THP
Turbosmart "Kompact EM Dual Port" Dump Valve VR2 Mercedes AMG, Ford Ecoboost
Turbosmart "Kompact EM Plumb Back" Recirculation Dump Valve VR10 for Peugeot, Citroen, DS 1.6 THP
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.