This 2.5" diameter Axle-Back system features the aggressive ATAK® sound level and single 3.5" round polished T-304 stainless steel tips on each tail pipe. A system with a black coated muffler assembly and tips is also available. This system comes with the BORLA® no drone guarantee. BORLA® Cat-Back™ & 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 you'd expect from the world's most experienced (and most winning) exhaust brand.