The Plumb Back is a 100% recirculating blow-off valve

Inlet Hose Adapter 1-1/2' OD

blanking plugs and washers

The Kompact BMW Kit is a performance bolt-on replacement for the factory plastic bypass valves offering greater boost response and no leaks

BOV Big Bubba BPV Sleeper JR23 The Plumb Back is aSometimes 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