Description:

Replacement for: Cummins B3.9L 4BT 4BTA 6BT 5.9L 6B 6BTA 6CT Engines. After replacing the new tensioner, make your car run more smoothly, reduce the noise, prevent the belt and chain transmission slip. The belt and chain play a guiding and tightening role, so that it is in the best tightening state, avoid belt slip, avoid synchronous belt jump teeth and tooth removal, prevent chain loosening, reduce the wear of sprocket and chain. Part Number: 3907469, 3908163, 3911315, 1240880H1, 3802287, 38504, 3904370, 3922900.