If you do not tell us the piston and rod size then I will send standard piston and standard rod by noon the next day. These are High Quality PARTS and I only sell what I use. Rebuild your John Deere, Cub Cadet, Wheel Horse, Case or Sears 8 HP K181 Engine. Anybody can rebuild a Kohler engine themselves. The suffix after the K181 does not matter, such as K181, K181S, K181AS and so on, all take the same rebuild parts. I will also give the instructions on how to properly install your connecting rod. The most common reason for premature engine failure on your rebuilt engine is an improper rod installation. This kit includes the following. 1- Piston COMES IN: Standard, +. 1- Connecting rod – Standard or. Wrist pin and 2 Clips. New set of points. 8HP K181 and M8. Are not for machine shop use, the machine shop must have your NEW piston before they can bore your cylinder. 140″ inch pounds Used: 100″ pounds. Div style=”font-size: 14pt; font-family: Arial;”>. The item “Deluxe Master K181 Engine Rebuild Kit for 8HP KOHLER, M8 With Ex valve & bearings” is in sale since Tuesday, August 27, 2019. This item is in the category “Home & Garden\Yard, Garden & Outdoor Living\Lawn Mowers, Parts & Accessories\Lawn Mower Parts”. The seller is “bakt4kids” and is located in Wauseon, Ohio. This item can be shipped worldwide.