BORLA(r) system is a True Dual design. This 3" diameter mid-section / Muffler assembly includes Active Exhaust Valves. The S-Type sound level delivers an aggressive yet balanced sound with a deep tone without any drone. It features our SwitchFire(r) technology that completely eliminates the turbulent center intersection of a standard X-Pipe BORLA(r)'S patented SwitchFire(r) design truly blends the combustion pulses from both sides of the engine for improved performance and a custom sound. The system also features Polyphonic Harmonizer technology that utilizes patented units that contain pipes of different diameters and lengths to create multiple exhaust notes that harmonize to deliver a clean rich full-bodied sound. This mid-section / muffler assembly fits with either BORLA(r) tail pipes 60727BC black chrome on T-304 stainless steel 60727CB brawler style black coated T-304 stainless steel 60727CFBA carbon fiber with black anodized center or the Original Equipment (O.E.) tail pipes. The system is constructed using T-304 stainless steel superior to T-400 series knockoffs (such as 409) to give you the absolute best in performance and durability. Ultra-smooth mandrel bends ensure maximum flow & power and precision computer numerical control (CNC) manufacturing ensures an accurate fit. Best of all it is backed by our Million Mile Warranty, System Features, Cat-Back(tm) Exhaust System, System is a True Dual design, S-Type Sound Level, SwitchFire(r) Technology, Includes Active Exhaust valves, T-304 Stainless Steel Construction, Million Mile Warranty