The service kit piston BIHR is a pack that combines the need for reconditioning your high-engine: Casted Piston, Axis, Segment(s) and VertexRoaded Keyboard Centauro Needle Cage (2 time only) Piston size (Ø mm): DA: 53,94 DB: 53,95 DC: 53,96 DD: 53,97