Stihl Ms 441 Piston & Cylinder Kit 50mm, Replaces 1138-020-1201 Installation Instructions Included

Stihl Ms441 Replacement Piston And Cylinder Kit 50mm, Replaces Part # 1138-020-1201, Kit Includes Piston, Cylinder, Piston Pin, Rings And Piston Pin Clips.Material- The factories use the highest grade material coming from Japan. This is AC4B. 2. Coating- Before coating, all performance saw cylinders are put through 13 preliminary processes to ensure maximum penetration, thickness and coverage. Coating thickness is .04-.06 mm of chrome which increases the life of the cylinder. 3. Machining- Complete machining on all cylinders is performed by accurate CNC tool machines. 4. Die-Casting- All cylinders are made by slow gravity fed die-casting. This increases the weight of the cylinder which enhances the performance and life of the rebuild. 5. Tooling- Each cylinder tooling has limited life and are replaced after the manufacturing of 50,000 pieces. All tooling is checked on a monthly basis. 6. Quality Control- Special inspection is done on every cylinder inlet and exhaust port which include