Chevy Spacer, Water Pump Pulley, 1955-1957

Reproduction Of Original Replaces GM # 3720616 Cup Shaped 1/4 Deep 3.5 OD X 5/8 ID 4 - 11/32 Holes Don't forget to add this important item to your water pump install or engine rebuild. Without this spacer you might have belt misalignment or extra wear on the pulley.

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