Edelbrock 8- Chev E-Tec 170 Int Valves 1 940 X 4 910

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 #9779 Intake Valve is a 1.94" 1-piece, swirl-polished, hardened tip stainless steel valve with undercut stems for increased flow. Fits Edelbrock #60979 Cylinder Heads. Edelbrock Performer RPM Single-Stage Nitrous System #70090 is designed for use on carbureted V8s. Power increases can be adjusted from 100-250 hp. This system is for use with square-bore carburetors and has a polished bottle. Chevrolet:Small-Block Gen I:262 (4.3L)-400 (6.6L)