The aFe Universal fit 409 Stainless Steel Performance Muffler is designed to provide a deep, throaty, powerful sound on acceleration, but maintain a smooth sound at idle. This muffler is constructed of brushed finished 409 stainless steel and uses a straight through perforated core with heat resistant packing to reduce backpressure and maximize exhaust flow. You will see increased performance and improved throttle response over the factory exhaust. Also featuring a stamped aFe Power logo for an aggressive style. Muffler Specifications 3 - 12 Center Inlet Outlet, 24L Body Diameter. All aFe exhaust systems are engineered and manufactured i n our Corona, California manufacturing facility.