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What does a dump valve do? Quite simply it help to 
release the excess pressure built up by the turbo after the turbo has been boosting. This has the effect of stopping the turbo blades from stalling thus easing the pressure on the turbo bearings, prolonging the life of the turbo and improving throttle response

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The Evil Twin Smart car dump valve is a piston dump valve and tends to be preferred by those that don't wish their dump valve to be too noisy or obtrusive 

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The Forge Motorsport Smart car dump valve is a diaphragm dump valve and as such makes quite a loud whooshing noise whenever it releases the boost pressure. This dump valve is loved by those who want it loud...

All our Smart Car dump valves come supplied as a complete kit with all hoses and clips included

Dump valves
(Forge or EVIL TWIN)
£120

You can buy our Smart Car dump valves online by clicking here
Click here for fitting instructions