Aeroflow 11 Psi Blow Off Valvespring Use With 64-4050 New Carburettor and TBi We recommend the use of

We recommend the use of Loctite 262 or similar so they won’t come loose over time

Single Valve Spring to suit Aeroflow Performance 175cc Ford Windsor Small Block cylinder heads

Porsche and Ford Model Harness

Part Number: AF557-12-16BLK

pulley only to suit holden 253-308 v8 gilmer kit

Aeroflow 11 Psi Blow Off Valvespring Use With 64-4050 New Carburettor and TBi We recommend the use ofPart Number: AF59 2153 these replacement blow of valve springs are specificallydesigned to fit inside the Aeroflow performance 50mm blowoff 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, weoffer either a softer 6 psi for turbo setups or a 2 psi spring designed for supercharger options.