Aeroflow’s 50mm universal plumb-back blow off valve is one of the highest flowing on the market. For use on turbocharged and supercharged applications. The body and all internal components are CNC-machined from 6061 aluminium alloy. 1.98″ (50.5mm) valve. Oversized 7mm hose barb. 34mm plumb back option included with other sizes sold separately. Flange is v band and comes with a 2″ weld-on pipe. Available in both black and polished finishes.