Genuine GM LS Timing Chain 12646387 (Single Row) – Fits LS1 LS2 LS3 L76 L77 L98

Factory replacement Genuine GM single row timing chain, part 12646387. Designed to maintain precise camshaft-to-crankshaft timing in LS-series engines. OEM-quality construction ensures accurate valve timing, durability, and reliable performance.

Fitment:
- Suits LS1, LS2, LS3, L76, L77, L98 engines
- Fits Holden Commodore VY, VZ, VE, VF and HSV / Statesman variants using LS engines
- OEM factory replacement for rebuilds, upgrades, or servicing

Superseded / Replacement Part Numbers:
- Replaces GM 12586481

Related Parts:
- For correct installation, replace the timing chain tensioner
- Compatible tensioners: GM 12626407 (later design), GM 12588670 (early design) – available separately in store

Perfect for rebuilds or servicing where maintaining factory timing accuracy and reliability is essential.