The MagnaFlow 4 Inch X 9 Inch Oval Straight-Through 11386 is engineered to enhance your ride with a healthy helping of our signature exhaust sound and dyno-proven performance thanks to its free-flowing straight-through perforated stainless steel core wrapped in stainless steel mesh and acoustic fiber fill. The reversible, universal 2.5/2.5 Inch diameter inlet/outlet Straight-Through layout allows you to install it in whatever orientation and configuration you see fit. However, professional installation is highly recommended. Muffler 11386's weight-optimized 4 X 9 X 14 Inch oval-shaped body features a satin finish that elevates the overall aesthetics of your current exhaust setup. 11386 is made of durable, corrosion resistant stainless steel and produced using cutting-edge CNC precision robotic manufacturing techniques.