For LS1/LS2/LS6/4.8L, 5.3L, and Pre '07 6.0L Truck Engines and Other Cathedral-Port Head Equipped LS Applications. Includes Full Set of (16) Stud-Mount Rockers (with Poly Locks), 3/8" Studs and Raised Guide Plates for 5/16" Pushrods. Increase Strength...