The Katech C5-R Timing Chain (KAT-7636) is one of the most respected and proven high-strength timing chains in the LS performance world, originally developed for the Corvette C5-R endurance racing program. This chain provides exceptional durability, reduced stretch, and superior valve-train stability across high-RPM, boosted, or aggressive camshaft applications. Engineered for long service life under extreme conditions, the C5-R chain is compatible with a wide range of LS engines—including LS1, LS2, LS3, LS6, LM7, LQ4, 4.8L, 5.3L, 5.7L, 6.0L, 6.2L, and 7.0L Gen 3/4/5 builds. Whether refreshing a daily driver, upgrading a street/strip setup, or assembling a competitive racing engine, the C5-R chain delivers premium reliability and precise valve timing control.