52mm piston diameter
O/E:503 60 98 03

Fits Stihl 038 & MS381

Suits Husky
O/E: 503 57 76 02

Suits 24548A 3/8" Chain Breaker

40mm piston diameter
O/E:KP01031AA / FR66812

Suits Husky 61, 268 & 272

Suits Stihl
O/E: 1119 640 3200

58mm piston diameter
O/E:1106 030 2003

Crankshaft Stihl FS160 & more

Suits Husky
O/E: 501 62 66 02

Rebuild Kit (non original) O/E: RB 100

Gasket Set