A full atmospheric BOV for racers and serious enthusiasts who want to be noticed. Supersonic provides a superior flow performance with the famous Supersonic sound. Featuring a tool-free adjustment via a rotating cap and a positive-seal piston, this is Turbosmart loudest BOV. 
 
Please note; 
When using this with a TTS Rotrex super charger kit please order the 4-5mm reducer option
This bov would require you to reweld the spout on to the pipe.