Here is the materials for the piston, piston pin: 1. Piston: Materials: Aluminum: ZL109 Chemical Elements: Cu: 0. 5~1. 5 Si: 11. 0~13. 0 Mg: 0. 8~1. 3 Zn: 0. 20max Fe: 0. 70max Mn: 0. 20max Ni: 0. 8~1. 5 Ti: 0. 20max Sn: 0. 05max 2. Piston pin: 40CrMo. Cu: 0. 38~0. 45 Si: 0. 17~0. 37 Mn: 0. 50~0. 80 Sn: 0. 0035 Cr: 0. 90~1. 20 Mo: 0. 15~0. 25 Ni: allow to the impurity less than 0. 030 P: allow to the impurity less than 0. 035 In addition, we can offer you the every kind of OEM package such as Mahle, KS, Geotze for European cars. . .