The South Bend ISK1.375 Input Shaft Upgrade Kit contains all the necessary parts to upgrade your 5.9 Cummins 1994-2003 to a 1.375" input shaft. This will allow your transmission to handle more power and torque, giving you the confidence to take on even the toughest challenges. The South Bend ISK1.375 Input Shaft Upgrade Kit is backed by our quality guarantee, so you can be sure it will perform as advertised. Order your kit today and enjoy the peace of mind that comes with knowing your transmission is up to the task.