This Edelbrock 1.72" exhaust valve is a single, one-piece stainless steel valve with a swirl-polished face, hardened tip and undercut stem to improve exhaust flow. With an overall length of 5.100", it fits specified Edelbrock W-Series Big-Block Chevy cylinder heads and serves as an individual replacement part for applications requiring upgraded exhaust valve flow characteristics.
Edelbrock Valve Exhaust 348/409 W-Series BBC (60809 and 60819) Single Valve