Ensure the optimal performance of your Cummins 6BT 5.9L engine with our high-quality Main Bearing Set STD. Engineered to meet OEM specifications, the set includes part numbers 3802520, 3929021, and 3929016. This package contains 1 set of Main Bearing Set, designed for durability and reliability in rigorous operations. Trust in our expertise as a leading supplier and distributor of tractor and skid steer parts, committed to delivering only the best aftermarket products. Enhance your equipment's efficiency and longevity with our Main Bearing Set STD.