The COMP Cams Stage 2 Thumpr master camshaft kit is for Gen IV LS engines (4.8/5.3/6.0L) and is aimed at modified 5.3L and 6.0L trucks seeking an aggressive idle. The master kit includes lifters, timing set, pushrods, dual springs, retainers, locks, spring seats and valve seals, providing a complete cam upgrade intended to deliver the Thumpr idle and support tuned valvetrain components.
COMP Cams Stage 2 Thumpr 227/237 Master Camshaft Kit GEN4 LS 4.8/5.3/6.0L