Edelbrock 1- Ford 60259 60359 Int Valve 2 020 X 4 909

1-piece, swirl-polished, hardened tip stainless steel exhaust valves with undercut stems for increased flow. Hard-chromed valve stems are 11/32in. except where noted The Edelbrock #9760 Intake Valve is 2.02" 1-piece, swirl-polished, hardened tip stainless steel valve with undercut stems for increased flow. Fits Edelbrock 60989, AMC, S/B Chevy & Ford Cylinder Heads. Edelbrock Performer RPM Nitrous Plate Kit #70060 system is for use with square-bore carburetors and capable of 100-250 horsepower. AMC:-:343 (5.6L)-401 (6.6L);Chevrolet:Small-Block Gen I:262 (4.3L)-400 (6.6L);Ford:Small-Block:289 (4.7L)-351W (5.8L)