O.S. replacement mufflers have aluminum construction. Expansion-type design for maximum muffling. Muffler comes pre-tapped. This product includes one muffler, two 3mm x 28mm muffler mounting screws and one pressure fitting.
Overall length: 108mm (4.26") Diameter: 30mm (1.18") Center to center of mounting holes: 35mm (1.379") Rectangular exhaust port: 29mm x 6.5mm