Spice up your engine bay with our ZZP M90 billet bypass valve. Constructed from billet aluminum with a serviceable diaphragm, the ZZP billet valve holds boost reliably and ensures worry free operation on your M90 supercharged car. Our valve has a replaceable diaphragm and it is modular, meaning you can rotate the housing for your specific setup. Etched billet housing, stainless hardware, and a powder coated aluminum bracket are the perfect combo for your blower build. 

Includes vacuum hose and zip ties to finalize installation.  

Fits: Gen 3 and Gen 5 M90 superchargers. 97-08 Pontiac Grand Prix, 97-04 Buick Regal GS, 04-05 Chevy Monte Carlo SS, 04-05 Chevy Impala SS, 96-03 Pontiac Bonneville SSEi, and 95-99 Buick Riviera. 

Fitment note: Fitment on Gen 5 supercharges can be tight. The cap, and thus top fitting, can be rotated if you feel it is necessary. However with an intercooler hood clearance is tight. See installed photos on a Gen 5 blower.