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This HKS V-ribbed belt (4PK1240) is a replacement drive belt intended for HKS supercharger component applications that call for a 4-rib, 1240 mm length belt. It provides the specific belt geometry required to drive accessory or supercharger pulleys where that size and rib count are specified. Use it when the original belt specification matches 4PK1240 to restore proper belt routing and tension.
HKS V-RIBBED BELT 4PK1240
