Our products line includes following piston ring used in the following engine model:1) Cummins: 6TB, NH220, NH250C, NH250E, 6CT, K2) Perkins: D4203, 6.354, 4.238, T4236, D2353) Ford: 6Y7A, D610-305, D1210, 3000D, 2.5D1, 2496CC4) Mercedes-Benz: OM615, OM352, ...