• KRC adjustable idler tensioner assembly prevents belt slippage due to deceleration of a mechanical fan
• Available for 604 Crate or 602 Crate/ Standard SBC
Idler tensioner bracket, hardware, spacers, and instructions
** 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**
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