• KRC adjustable idler tensioner assembly prevents belt slippage due to deceleration of a mechanical fan
• Available for 604 Crate or 602 Crate/standard SBC engines
Kit Includes:
Idler tensioner bracket, hardware and spacers
**604 Crate engines have a thicker timing cover that requires the water pump to have a 3/8" shim behind it, therefore changing the bolt lengths into the water pump**