Add to Favorite Sellers. Sleeve and Piston Kit 4 overbore Farmall M MV O6 OS6 T6 W6 Tractors 374264R91. Quality Aftermarket Sleeve & Piston Kit w/ 4 overbore Fits International Harvester IH Farmall M, MV, O6, OS6, T6, W6 Tractors with C-248 gas engine Specifications This 4-cylinder kit has a 4 overbore. Includes sleeves, aluminum stepped head pistons, piston ring sets, piston pins and pin retainers. Most other sets available by special order. 1.312 wrist pin O. (cold) 4.124 Please be careful installing the sleeves. If the bore is not cleaned or honed properly, then the sleeves will break if you apply too much force. We are not responsible for sleeves broken during installation Replacement Numbers 374264R91, PK155. We recommend verifying the proper fit for your application with a parts catalog or other reference documents. All aftermarket items have been hand selected by our team and are continuously monitored by a quality control department. Should a craftsmanship or fitment concern be identified, JJAgParts will be sure to work with our customers to stand behind our products. Be sure to check out our other listings for great aftermarket and NOS items! Don’t forget to leave us feedback and we will be sure to do the same! . Thank you for this opportunity to earn your business! Thank you for looking! We appreciate the opportunity to earn your business. Feel free to ask any questions you may have.