Piston Ring Set Fits John Deere Tractor Fits: John Deere- Some M, MT, 40, 320, 330 series 2-cyl.- Specifications 4" bore, (3) 0.093" compression rings, (1) 0.250" oil ring Replacement Numbers: John Deere- AM1625T- Do not order by tractor model only. Due to the many different piston manufacturers, there can be as many as 8 different ring sets available for one particular engine. To ensure you order the correct rings, we will need the following information: 1.) bore size, 2.) thickness of each ring, 3.) how many of each ring thickness per piston. Rings can not be returned if opened. Call or email for price and availability of other sizes. All JJAgParts items have been hand selected by our team and are continuously monitored for Quality. Should a craftsmanship or fitment concern be identified, JJAgParts will work with you to stand behind our products. JJAgParts is an American owned and operated family business! Here at JJAgParts, we strive for customer satisfaction. If you are not satisfied with your order, please contact us so we can make it right. Note: OEM Part Numbers are for reference only and should be verified before purchase.