Edelbrock 1- Ford 60229 60329 Int Valve 1 900 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 #9764 Intake Valve is a 1.90" 1-piece, swirl-polished, hardened tip stainless steel valve with undercut stems for increased flow. Fits Edelbrock #60229 & #60329 Cylinder Heads. Edelbrock Performer RPM Nitrous Plate Kit #70063 is for use with 4500 Series carburetors and capable of 100-250 horsepower. Ford:Small-Block:289 (4.7L)-351W (5.8L)