6C 6CT 6CTA Engine Rebuild Kit for Cummins Diesel 8.3L Tractor Truck 6CT8.3 12V. Engine Rebuild Kit Item content. 1 Set of Overhaul Gasket Kit. Set Rings for 6 Pistons. 1 Set of Main Bearings STD. 1 Set of Rod Bearings STD. 1 Set of Thrust Bearings STD. For Cummins 6C 6CT 6CTA 6CT8.3 Diesel 8.3L Tractor Truck Excavator. For Cummins Hyundai Excavator R300-5. Return are Accepted for Manufacturing Defect, Pls check listing details or feel free to seek dimensions, lets work on 1st time right. So please try to give your complete address with Telephone number. We do same for our buyers. Listing and template services provided by inkFrog.