The STIHL 11302000557 is a genuine OEM Cylinder and Piston Assembly designed for various STIHL chainsaw models, including the MS 170, MS 180, MS 180 C, MS 170 D, MS 170 C, MS 180 C-BE, and MS 170 C-E. This critical engine component ensures optimal performance and reliable operation. It features a piston diameter of 38 mm, providing precise fitment and durability for demanding applications. Replace worn or damaged cylinder and piston assemblies with this authentic STIHL part to restore your chainsaw's power and efficiency.