STIHL FS450 Piston Rings Only | Sold Per Ring!

Sold Per Ring!! Part Number: 1123 034 3003 Size: 42 mm × 1.2 mm Fits Models: STIHL FS 450 STIHL FS 450 K STIHL FR 450 STIHL SP 451 STIHL 025 This is the original STIHL OEM piston ring used on the 42 mm piston found in the FS450 engine family. It helps maintain proper compression, starting performance, and engine power. If you're rebuilding an FS450, I would recommend checking: Piston condition Cylinder wall for scoring Ring end gap Wrist pin bearing If the piston or cylinder is damaged, replacing only the ring may not restore compression properly.