flat, 1-piece, non-adjustable. For 5/16" diameter pushrods and 5/16" Rocker Studs. Fits Oldsmobile 350-455 c.i.d. V8 using stereo lithography Techniques for an accurate fit. Feature exact Stud placement and rounded contact points. Necessary for high lift/spring pressure environments of performance engines. Hardened and black oxide finished. No machine work required with Part #4542-16 Studs.
