Hi, and thanks for the interest in These pistons,they are for a willy's 4 cyl Jeep engine ,The Pistons says 60 over.Hard to find have not made in years. New Old Stock # 602. Rings Availible an can be added Please ask any Questions measure and look well. Fits  Willis 40-46 possibly 51-4 Henry J, The best I can tell from Crossover. If you are not Happy we will give a complete refund, on orders within U.S.,simply return Item, However orders out of the Counrty make sure you get it right and ask the right Questions I can't pay your shipping That's yours in that case. look at your pistons and the pitchers ask if needed. will be glad to measure if needed.