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The ARP water pump pulley stud kit includes 5/16-24 x 4.500 black hex studs paired with a 3.250-inch fan spacer, supplied as a stud-and-spacer set for pulley mounting. It’s intended for installations requiring the specified stud length and spacer dimension; components are provided together to replace or service pulley hardware with those exact measurements.
ARP 5/16-24 X 4.500 Black Hex Water Pump Pulley w/ 3.250in Fan Spacer Stud Kit
