Piston: High qualtiy aluminum alloy (ADC12) 2 Tensile strength is =196.12 Mpa 3 Super strong hardness 95-130HBC Motorcycle pistonPiston:High qualtiy aluminum alloy (ADC12) 2 Tensile strength is =196.12 Mpa 3 Super strong hardness 95-130HBC1.Piston kits features:The pistons are casted with high silicon aluminium alloy,The surface treatment adopts exclusively anode oxidizing technique, , which is ...