Replacement piston cylinder kit for 371, 371XP, and 365 chainsaw models. Includes clip rings, 50mm piston, cylinder, and bearing components. Designed for use during engine maintenance or repair. Compatible with standard 50mm bore assemblies. All parts in the set are sized to fit specified chainsaw configurations. Intended as a service part for rebuilding or restoring chainsaw powerheads. This replacement part is independently produced. All brand references are for compatibility demonstration only.