Centerforce’s new Diesel Twin kit (Part No. 04026651) is for 2005.5-2013 Cummins-powered Rams with the G56 6-speed manual transmission.  

   Centerforce’s patented ball-bearing pressure plate and centrifugal weights add the clamping force, giving the Diesel Twin a rated 1,700 lb-ft holding capacity. Because diesels turn lower rpm than gas en-gines, Centerforce re-engineered the signature centrifugal weights to provide more force at the lower-rpm. Further, the pressure plate’s diaphragm fingers are adjusted properly at the factory — no need to align or adjust them with a prybar during installation. Smooth engagement comes from the two-stage sprung hub friction discs, which were developed specifically for the Cummins application. The primary springs help dampen engine vibration and transmission gear rattle, then the secondary springs absorb the shock and harmonics when the clutch is engaged. Centerforce’s patented ball-bearing pressure plate and centrifugal weights add the clamping force, giving the Diesel Twin a rated 1,700 lb-ft holding capacity.  

    Attention to details includes: New single-mass flywheel with a larger-than-stock pilot bearing; a balanced pressure plate, floater and flywheel assembly (a paint mark indicates the proper balance align-ment); premium ARP fasteners/bolts; a new pre-bled hydraulic slave and master cylinder; a new throw-out bearing; a starter spacer and an alignment tool. Each assembly comes with a spec sheet with the test results specific to the clutch in the box.  

   The Cummins ISB straight-6 diesel engines are legendary for their reliability, tunability, and overall power potential. In recent years, this workhorse has been boosted from nearly 600 foot-pounds of torque to over 850 foot-pounds of torque. Simple tunes can net increases of over 250 foot-pounds of torque. With increased power levels, the stock clutch quickly becomes inadequate for even basic driving, leading many enthusiasts to install an aftermarket clutch system — which historically results in drivability compromises. Centerforce developed the Diesel Twin clutch kit to eliminate common compromises such as stiff pedal feel, rough engagement and annoying noise.