50 mm Blow Off Valve Polished Finish V-band Weld-on Flange

this is the highest flowing universal blow off valve. For use on turbo-charged and supercharged applications. The body and all internal components are cnc-machined from 6061 aircraft grade aluminium. 1. 98 in (50. 5mm) valve. 7mm vacuum / boost hose barb size. Flange is v band, and comes with a 2" weld on pipe. Supplied with an11psi spring, optional 6 or 2psi springs available separately.