This gasket is an RC-scale exhaust muffler seal intended to replace worn or damaged gaskets on compatible muffler flanges. It helps restore a tight seal between the muffler and the engine exhaust flange, reducing leaks that can affect idle and tuning consistency.
Compatibility is limited to the models listed in the product name: G450PU and G620PU. Confirm the flange dimensions and part fit before installation to ensure correct seating and to avoid misalignment. This listing is for the gasket only, without any packing or additional hardware.
Installation notes: clean mating surfaces, remove old gasket material, position the new gasket evenly on the flange, and reassemble following your muffler or engine manufacturer's torque guidance. Check for exhaust leaks after a short run and retighten fasteners as needed. The gasket's role in tuning is to maintain stable back pressure and prevent exhaust leakage that can alter mixture and idle behavior.
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