This is the quietest muffler that we have run across for the GX390/Clone and 460cc engines , its a straight through design with significant sound reduction packing and it still allows the engine to breath.
A dyno proven 2hp at the wheels over the RLV silencers and drastically quieter to begin with.
Aluminized Steel, 1.375 in. Side Inlet, Center Outlet, 14.630 in. Length
Made in the USA!