Replacement Muffler. This muffler canister is manufactured using 409 stainless steel and features a 2-inch diameter straight-through design for maximum performance gains. Finished with a 3-inch polished 304 stainless steel tip, this muffler sounds as good as it looks! This bolt-on component comes complete with a mounting gasket, and can be ordered separately or with the Right Muffler (Part No. 16443). This muffler will bolt directly to the stock Y-pipe or the Racing Beat Y-pipe.