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I tried a universal type and it was ****e. Bought a second hand ARC DV and once adjusted correctly it works a treat. Its not one of the loud as **** type DV's either so I don't need to shout 'I'm a **** out the window every time I change gear'..
Hi mate, ive tried loads of dump valves ,the best one i have found is a Turbosmart ,the are fully adjustable and they will cope with the pressure great sound and performance mine cost me £220 but well worth it .