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: 53,92 DB: 53,93 DC: 53,94 DD: 53,95