Description: Stainless steel internal core provides increased durability over mild steel. Giving you a high performance system with a minimum amount of maintenance. Exhaust core and end-cap shape has been optimized to extend the output of exhaust. Gives your vehicle a better air Flow And performance. Made of stainless steel, anti-corrosive, corrosion resistance, durable. Specification: Material: Metal Inlet Inner Diameter: 28mm/1.1 inch Size: 260mm/10.24inch Package Includes: 1 Piece Motorcycle Exhaust Muffler