flat, 1-piece, non-adjustable. For 5/16" diameter pushrods and 5/16" Rocker Studs. Fits Dodge Magnum V8 (318/360 c.i., 5.2/5.9L), 3.9L V6, and 8.0L V10. Designed 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.