The Edelbrock #9773 exhaust valve is a one-piece, swirl-polished stainless steel valve with a hardened tip and undercut stem to improve flow. Each valve measures 1.55" with a 4.930" overall length. This listing is a set of eight valves and is specified for Edelbrock #60797 cylinder heads for multi-valve replacement.
Edelbrock 8- Chev E-Tec 170 Exh Valves 1 550 X 4 930