Cummins ISX/QSX Belt Tensioner 3691282 2871292 3682946 4299051 *Please verify your OEM number(s) before purchasing. Heavy Duty Belt Tensioner Fits Cummins ISX and QSX Engines OEM Part Number Cross Reference: 2871292 3682946 4299051 2428-89440 3691282 Material: Aluminum Pulley Material: Plastic Pulle... See More