On Sale Now! Save 3% on the March Performance 623 Serpentine Pulley for Small Block Chevy Engine by MARCH at Cheap Auto Glass. MPN: 623. Hurry! Limited time offer. Offer valid only while supplies last. Serpentine Power Steering PulleyKeyway (5/8'' Bore)6-Groove5.91'' Diameter Use with standard rotation long water pumpKeyway (5/8'' Bore). 6-Groove. 5.91'' Diameter Use with standard rotation long water pump.
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