Edelbrock 1- Ford 5 0 60399 60299 Int Valve 2 020 X 5 090

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 #9778 Intake Valve is a 2.02" 1-piece, swirl-polished, hardened tip stainless steel valve with undercut stems for increased flow. Fits Edelbrock #60399 Cylinder Heads. Edelbrock Performer RPM Single-Stage Nitrous System #70053 is designed for use on carbureted V8s. Power that can be adjusted from 100-250 horsepower. This system is for use with 4500 Series carburetors and has a silver powder coated bottle. Ford:Small-Block V8:302 (5.0L)/351W (5.8L)