Aeroflow BBC heads 1 x valve - AF59-4273

Suit BB Chev, 1.625" O.D (Each)

Replacement Valve Spring.

Dual Valve Spring with damper to suit Aeroflow Performance 320cc Chevy Big Block cylinder heads.

Will handle up to 0.850" maximum lift. To suit aggresive hyd roller and solid roller camshafts.

Outside Diameter of Outer Spring - 1.625".

Inside Diameter of Outer Spring - 0.880".

Installed Height - 2.08".

Seat Pressure at Installed Height - 275 lbs.

Maximum Lift - 0.850".