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Return to Parts List Category : E- Big Block (Raised Deck) ARE AR112 WATER PUMP PULLEY SPACER .060" THICK $4.50 AR112 is an 0.060 inch thick spacer designed to correct minor spacing issues with the water pump pulley.  Manufacturing variances in gasket thickness, pulley depth and water pump depth can all add up to a misaligned pulley.  These spacers can be used to move the pulley outwards as needed.