Seller notes

25mm Supersonic Blow Off Dump Valve Made from billet aluminium, this SuperSonic diverter valve vents some to the atmospshere to create the desired *woosh* sound.. This increases both quicker throttle response and higher clamping load to maintain boost pressure more reliably and turns heads! IT also allows adjustability to the preload, to set it up to work in harmony with your driving style and engine. Our 25mm Supersonic valves will fit all Audi, VW, SEAT, Porsche and Skoda (VAG) 1.8T and 2.7 Bi...

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