Notes: It is recommended to install new exhaust gaskets and a suitable jet kit when changing an exhaust system to a carbureted motorcycle, or new exhaust gaskets and a digital fuel processor when changing an exhaust system to a fuel-injected motorcycle. Discoloration (blueing) is caused by tuning characteristics, such as cam timing, carburetor jetting, etc., and is not caused by faulty manufacturing. Material: Stainless Steel Color as shown Package Contents: 1 x Muffler Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in a little different from the real thing. The measurement allowed error is +/- 1-3 cm.