Borla Cat-Back exhaust features patented, straight-through and multi-core technology to unleash hidden horsepower. Increased exhaust velocity adds power, driving excitement, fuel economy which is respected by motoring enthusiasts everywhere. Each system is built from premium austenitic stainless steel and superior to T-400 series knockoffs. Ultra-smooth mandrel bends ensure maximum flow and power, and precision computer-controlled CNC manufacturing ensures an accurate fit. T-304 Stainless Steel Bolt On Installation All Welded Construction Made In USA Classic BORLA Sound