The MagnaFlow 4 X 9in. Oval Straight-Through Performance Exhaust Muffler 14377 brings our signature sound and dyno-proven performance to your ride with a free-flowing straight-through perforated stainless steel core wrapped in stainless steel mesh and acoustic fiber fill, and a weight-optimized, reversible 2.5/2.5in. diameter inlet/outlet Straight-Through layout. Muffler 14377s 4x9x14in. oval-shaped body features a premium, brushed finish for an elevated aesthetic that matches the enhanced exhaust note and performance that this muffler brings to your ride. The universal design allows for flexible placement of 14377 within your exhaust system to meet the specific spacing requirements of your vehicle, although professional installation is highly recommended. 14377 is made of durable, corrosion resistant stainless steel and produced using cutting-edge CNC precision robotic manufacturing techniques, all backed by MagnaFlow's limited lifetime construction warranty.