Borla Stainless Steel Cat-Back Exhaust Systems are engineered to provide excellent exhaust emission and internal power generation. These exhausts feature a multi-core technology and are manufactured from austenitic stainless steel which offers long lasting durability. They are equipped with ultra-smooth mandrel bends ensuring maximum flow and power. These exhausts provide brilliant fuel economy and increase horsepower efficiently. They are corrosion resistant and ensure easy installation. Borla Cat-back TM & Rear Section exhaust systems feature patented straight-through and multi-core technology 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 300-series 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-controlled 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 exhaust brand.