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New Mercruiser Serpentine Belt Idler Pulley 807757T 4.3L 5.0L 5.7L 350 mag v6 v8 This product is Aftermarket New Mercruiser serpentine idler belt pulley Fits many engines V6 and V8 If yours has an outside diameter of 3 1/4" this is the pulley you need! Uses 6 groove, 1" wide serpentine belt. If you need the 2 7/8" wide pulley, please click HERE Manufacturer Part Number:807757T SHIPPING FREE Before placing an order, please confirm that this is the item you need to avoid unnecessary trouble for bo...

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