LS 5.3L / 4.8L Stage 2 Thumpr Camshaft Install Kit w/GM Performance 12499225 Lifters – COMP 54-702-11 226/237 Cam – Strong Lope Performance Upgrade –($995.00Value)

Description

This is a premium kit that is MADE IN THE USA. Every component in this kit is proudly manufactured in the USA, ensuring the highest quality and reliability on the market. Unlike cheaper import kits that risk premature failure, this kit delivers lasting performance while supporting American manufacturing and helping bring jobs back to the USA. Classic “Thumpr” Idle and Deep Exhaust Tone from 113° LSA — The lobe separation produces that rough-choppy, deep-lo-fe-lop idle and throaty exhaust note V8 fans crave. It’s not a mild lope — it’s a statement that your LS means business. (1) COMP CAM 54-702-11 STAGE 2 THUMPR 226/237 CAMSHAFT - 1,800-6,600 RPM Operating Range . 226/237 Duration at .050". 113 Degree Lobe Separation Angle. 0.541"/0.539" Valve Lift. - NO SPRING UPGRADE REQUIRED. (16) GENUINE GM/ACD PERFORMANCE 12499225 LIFTERS 1) PREMIUM UPPER HEAD GASKET SET - MULTI LAYERED STEEL 2) SETS OF PREMIUM FEL-PRO OR ELGIN HEAD BOLTS - (20) 11MM X 2.0MM X 100MM - (10) 8MM X 1.25MM X 44MM Noticeable Thumpr Idle Lope – Deeper, more aggressive idle than Stage 1 for classic LS sound Built for 4.8L & 5.3L LS Engines – Ideal for LM7, L33, LC9, and LY5 truck platforms and swaps .541/.539 Valve Lift Design – Efficient lift for better cylinder filling and throttle response 226/237 Duration Profile – Balanced cam timing for improved airflow and midrange power Upgrade your LS engine with the COMP Cams 54-702-11 Stage 2 Thumpr camshaft install kit, designed for stronger performance, improved throttle response, and a noticeable lope at idle for classic LS sound. This Stage 2 Thumpr cam delivers a significant step up from Stage 1, producing a deeper, more aggressive idle while still maintaining usable street drivability when properly matched with supporting modifications. Built for 4.8L and 5.3L LS truck engines, this cam is ideal for LM7, L33, LC9, and LY5 platforms or swap builds looking for a balance of sound and performance without going full race cam. This complete kit includes GM Performance 12499225 lifters for proper valvetrain operation and long-term durability when paired with a performance camshaft. All components are manufactured in the USA for consistent quality and dependable LS engine performance.