Turn heads with our new VTA BOV!! (SOUND ON) The T9401 VTA Blow Off Valve for VW and Audi vehicles! The factory electronic diverter on VAG engines has a 3-bolt mounting flange that means aftermarket BOVs typically vent through a series of 3 or more slots or holes. This kind of arrangement certainly achieves a blow off sound, but what if you want MORE? The T9401 has a large single venting outlet, fitted with a trumpet that both amplifies the sound and creates a high-pitch whistle. This configurat
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