Piston Kit 24113B Hc 24113BPiston Kit GP Racer's Choice for 4 StrokeThe piston skirt is coated with a high tech Molybdenum Disulphite coating for faster break in time and increased piston life T bridge design high compression piston with unique shot peened dome The piston is heat treated with a T 5 hardening and tempering cycle Wrist pin is DLC (Diamond Like Carbon) coated Ring set is nitride coated Kit Includes: Piston Ring Set Wrist Pin Circlips