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Edelbrock 1.66" exhaust valves (set of eight) for specified Pontiac heads are one-piece, swirl-polished stainless steel valves with hardened tips and undercut stems to increase flow. These particular valves are manufactured .120" longer than stock with an overall length of 5.230" and are intended as a complete set for the listed cylinder head part numbers where the longer valve is required.
Edelbrock 8- Pont Perf RPM 60599 Exh Valves 1 660 X 5 230
