Edelbrock Valve Intake 348/409 W-Series BBC (60809 and 60819) Single Valve

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 Edelbrock Valve; Intake; 348/409 W-Series BBC (60809/60819) Single Valve Edelbrock Performer RPM Intake Manifold for Chrysler 413-426-440 Big-Block V8. Chevrolet:W-Series:348 (5.7L)-409 (6.7L)