This clutch is for the 6 speed G56 transmission with the 5.9L and 6.7L Cummins engine. The G56 Con OFE features a variation from organic to organic and ceramic or all ceramic linings with marcelled fins. The pressure plate is modified for higher plate load and smoothness of engagement. This kit is rated up to 450 horsepower & 900 ft. lbs. of torque. The upgraded hydraulics, Hyd-X-.750, are included with this kit. The flywheel is NOT included with this kit. Notes: *If you aren't sure what transmission you have, in the G56, reverse is down to the left and it is aluminum cased. In the NV5600, reverse is up to the right and it has a cast iron case. **ETH is the engine code for the High-output 5.9L Cummins engine.