NV4500 Big 1 3/8" Input Shaft Conversion Kit 
Fits 1994-up Dodge Ram 2500/3500 with 5.9L Cummins Diesel 5 Speed

Kit includes: 
1 3/8" 10 Spline Input Shaft (SAE8620 Forged Steel) 
1 3/8" Bearing Retainer (Cast Steel) 
Input Shaft Bearing (KOYO)
Input Shaft Bearing Race (KOYO) 
Input Shaft Seal 

You will need a new clutch kit with 1 3/8" hub to work with this kit. 
Please ask questions prior to purchase.