This adapter kit will bolt the Cummins R2.8 to the Tremec TR-4050 5 speed 4×4 transmission. Kit includes the bell housing; which is the adapter directly to the engine, clutch fork, pivot ball, necessary bolts, and Oilite pilot bearing. This is the shortest kit on the market and is literally bulletproof. An engineering drawing will be provided so you can add the 6 bolt holes to your Cummins provided flywheel. If you would like to buy the kit with a pre drilled flywheel that can be done for $200 more. If you return your unused Cummins supplied flywheel Quick Draw Brand will refund $50 and even pay return shipping.