This system is a True Dual design that features a Resonator with an Internal H-Pipe Polyphonic Harmonizer technology and SwitchFire(r) technology. All of these features combine to create the aggressive ATAK(r) sound. It provides a more exciting driving experience without any drone. The Merge X-Pipe blends the combustion pulses from both sides of the engine for improved performance and a custom sound. Borla(r)'s Polyphonic Harmonizer Technology 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. Borla(r)'s patented SwitchFire(r) design further blends the combustion gases and sound waves. 4.5" carbon fiber with black anodized center tips provide a custom appearance. Systems with polished phantom style T-304 stainless steel tips are also available. Borla(r) Cat-Back(tm) exhaust systems feature patented technology to unleash hidden horsepower. Increased exhaust velocity adds power driving excitement fuel economy and the distinctive Borla(r) Sound of Power respected by motoring enthusiasts everywhere. Each system is built from premium high-quality T-304 austenitic 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 Borla(r) stands behind every system with a Million-Mile Warranty. Just what you'd expect from the world's most experienced (and most winning) exhaust brand. System Features:, Million-Mile Warranty, Cat-Back(tm) Exhaust System, 2.5" True Dual Design, ATAK(r) Sound Level, No Drone, Resonator with an Internal H-Pipe, Polyphonic Harmonizer, Dual 4.5" Carbon Fiber With Black Anodized Center Tips, T-304 Stainless Steel