This is a complete engine overhaul kit for Allis Chalmers tractors. Complete kits contain sleeves, pistons, rings, pins, complete gasket set, main bearings, and rod bearings. *Please specify bearing sizes when ordering* This kit is used on models D17 engine serial numbers 113009-117087, and 117104-119937, and the WD45 all with the 262 CID 6 cylinder diesel engine. This is a standard 3 9/16" bore kit. Be sure to add me to your ! Thanks For Your Business!!