BOV Big Bubba BPV BlackSometimes bigger is just better. Designed for large capacity supercharged and turbocharged engines, including turbo diesel engines, the Big Bubba is our largest and scariest Blow Off Valve. Big Bubba 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