This 2.5" diameter Cat-Back system features our latest engineering techniques to give you our aggressive ATAK sound without any "drone" inside the vehicle. The system features a Merge X-Pipe for increased performance and improved sound. The exhaust exits thru dual 4" x 2.5" rectangle polished T-304 stainless steel tips on each side for sharp appearance. Every BORLA ATAK exhaust system is tuned on a vehicle-by-vehicle basis to provide heart-stopping exhaust notes and maximum power. BORLA Cat-Backâ„¢ & Axle-Back multi-core technology is designed to unleash hidden horsepower. Increased exhaust velocity adds power driving excitement fuel economy and the distinctive BORLA 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 & power and precision computer numerical control (CNC) manufacturing ensures an accurate fit. Best of all BORLA stands behind every system with a Million-Mile Warranty. Just what youâ€d expect from the worldâ€s most experienced (and most winning) exhaust brand. Engineering innovation high-quality materials and state-of-the-art manufacturing make it easy to see why BORLA is THE choice of performance enthusiasts worldwide. For more information on BORLA products visit www.BORLA.com or call toll-free 1-877-GO BORLA. Also check out our exhaust sound comparison videos on YouTube at www.youtube.com/borla.