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Old 06-08-2009, 03:24 PM   #9
GP99GT
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Join Date: Aug 2004
Location: West Milford NJ
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depends on the brand, generally therse 2 diff part number combos. 5040510 would be the dayco style number, 40 means 4 rib, 510 means 51.0 inches...gates style numbers would be the above mentioned, 51K4 or something like that
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