SBC TIMING CHAIN COVER W/CRANK SENSOR

The Holley 21-153 is a cast aluminum timing chain cover designed as an upgrade for 1996-up Vortec Small Block Chevy engines. It replaces multiple GM part numbers, including 10244600 and 12523972. This cover is available for EFI applications with crank sensor provisions.

Key features include an over-molded FKM oil seal to prevent spinning out at high temperatures, a timing indicator cast directly into the cover for use with 8-inch Vortec or aftermarket balancers, and compatibility with both stock and aftermarket water pumps. The cover is offered in Natural Cast and Satin Black finishes.