1998, 1999, 2000, 2001, 2002 Dodge Cummins NV4500 5-Speed And NV5600 6-Speed Clutch Kits, Input Shaft Kits And Upgraded Hydraulic Kits. 13125-OR & OFEK, 13125-OK & OFEK, SDD3250-5K, 13125-OK, OK-HD & OFEK, SDD3250-6K Clutch Kits And Flywheels. ISK1.375 5-Speed Input Shaft Kit.