Upgrade your engine’s performance with our high-quality Cummins Connecting Rod Bearing Set STD. Specifically designed for 3.9L engines including models 4BT and 4B, this bearing set ensures reliability and durability. Featuring OEM Part numbers 3901170 and 3969562, it perfectly fits your vehicle’s requirements. The package includes 1 set of Connecting Rod bearings, providing everything you need for an efficient rebuild or maintenance. Trust Tractor, your leading supplier of aftermarket tractor and skid steer parts, for components that exceed expectations and keep you moving forward.