11 psi Blow Off Valve Spring AF59-2153 351W 550 Series Cutter Style One

550 Series Cutter Style One Piece Swivel 150° Stepped Hose End -6AN to -8 HoseSilver Finish

501-08BLK-25

Designed to suit -6 and -10 100 series hose or -8 and -12 200 series hoses

AF556-16-12S

11 psi Blow Off Valve Spring AF59-2153 351W 550 Series Cutter Style One11 psi Blow Off Valve SpringSuit AF64 5050 Blow Off Valve AF59 2153 59 2153 These replacement blow of valve springs are specifically designed to fit inside the Aeroflow Performance 50mm blow off valves. Both of our Aeroflow Performance blow off valves feature a 11psi spring from out of the box. If you wish to change this spring, we offer either a softer 6 psi for turbo setups or a 2 psi spring designed for supercharger options.