System contains a merge X-Pipe for increased performance and improved sound. The ATAK(r) sound level provides an aggressive growl with no drone, and 4.5" bright chrome on T-304 stainless steel tips provide a custom appearance. Black chrome on T-304 stainless steel tips are also available. Borla(r) Cat-Back(tm) and Axle-Back exhaust systems feature patented straight-through and multi-core technology designed 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 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 &amp