Sometimes bigger is just better. Designed for large capacity supercharged and turbocharged engines, including turbo-diesel engines, the Bubba Sonic is a large and scary full time vent to atmosphere Blow-Off Valve. 

Bubba Sonic features:
 Precision machining and assembly the piston and valve body are measured to mere fractions of a millimetre, and perfectly matched to fit each other exactly. Because of this precision, an O-ring is not needed to create an effective seal
 CNC billet aluminium body and components
 Huge 50.8mm/2 inlet and outlet
 Lightweight 52mm (2.05) hard anodised aluminium two-piece piston
 -4AN threaded vacuum port
 V-band mounting system interchangeable with the Race Port
 Weighs only 790 grams (1.7lbs)
 Designed, manufactured and validated in-house at Turbosmart HQ