1. Cummins 6BT5.9 belt tensioner. 2. It is with NTA package, which is our registered ... . OEM number: 3914086 Belt TensionerRemarks:1) We manage in belt tensioner, crankshaft oil seal, auto engine valve, piston, piston ring, piston ... and Southeast Asia. Desire our cooperation! Cummins 6BT5.9 Belt Tensioner