40 HP 1-3/8" 6-Spline Input Shaft 1-1/2" 12 Spline Output Shaft 1:1:47 Ratio 1" Nut in Bottom and Breather Plug Bolt Pattern: 6-1/2" (4) 5/8" Holes, 5" Center Hole Needed for Shaft Assembly The Input and Output Shafts Cannot be Purchased Serparately. They are Sold as a kit. The kit includes the following parts: input shaft, input gear, output shaft, output gear. The Shaft Kit Cannot Be Separated.