The Cast Aluminum Timing Chain Cover from Holley is a timing cover engineered and manufactured to Holley's specifications for consistent fit and function.

Holley 21-152 Features:

• Designed as an upgrade from the plastic OEM timing chain covers on 1996-up Vortec Small Block Chevy engines.
• Excellent upgrade for Chevrolet Performance crate engines that use the plastic timing chain cover.
• Available for EFI (with crank sensor provisions) and carbureted applications (without crank sensor provision).
• Includes over-molded FKM oil seal.
• Timing indicator cast into the cover - Intended for use with 8 in. Vortec balancers.
• Accommodates both stock and aftermarket water pumps.