Cummins 38631, 4937433, 5264111. 1 x Belt Tensioner As The First Picture Shows. The Use Of High-Quality Tension Pulleys Maintains Proper Belt Tension And Effectively Protects The Engine Belt System From Slack Or Over-Tightened Belts.
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3690067 Belt Tensioner Pulley Fits For Cummins ISX Engine 2891940 3104149 New