Upgrade your Cummins 6BT 5.9L engine with our high-quality Main Bearing & Connecting Rod Bearing Set STD, designed for models 6B, 6BT, 6BTA, and 6BTAA. This comprehensive package includes 1 set of Connecting Rod Bearings and 1 set of Main Bearings, ensuring a perfect fit and superior performance. Trust in our aftermarket parts, which meet or exceed OEM specifications (3901170, 3969562, 3802070, 3802520). As a leading supplier of tractor parts, Tractor is committed to delivering reliability and value to keep your equipment running smoothly. Invest in durability and precision with our expertly crafted bearing sets.