... Material : Cast iron , Alloy , Steel2. Piston ring Feature : 1 Chrome-plating ,2 Line-honing ,3 nitridation , 4 phosphating , 5 Molybdenum plated ... ,7 Oxidized,8 Nano,9 Zirconium-plating ,10 Sandblasted ,11 Special honing, 12 Titanium-plating, 13 Rail With Teflon B: Isuzu ... piston , 7 Forged piston piston, 8 Two pieces piston/Double pistonE: Gurantee for the piston: 1. we strictly adhere to the GB1148 ...