The Edelbrock #9317 1.68" exhaust valve is a one-piece, swirl-polished stainless steel valve with a hardened tip and undercut stem for improved flow. Overall length is 4.780" and it’s sold individually. This valve is specified for Edelbrock head #60519 for Olds exhaust valve replacement applications.
Edelbrock 1 Exhaust Valve 1 68 Olds 60519 Head