This muffler and exhaust gasket is a genuine Stihl replacement designed to seal the connection between the cylinder and muffler on compatible chainsaws. Made from heat-resistant gasket material, it compresses to create a gas-tight seal that prevents exhaust leaks, maintains proper back pressure, and ensures smooth engine performance. Suitable for medium to large Stihl chainsaws, including models MS311 and MS391, it is ideal for forestry, landscaping, and farm work. Replacing the gasket is recommended whenever the muffler is removed, during exhaust maintenance, or if you notice excessive noise, fumes, or soot around the exhaust outlet.
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