The Borla axle back exhaust for the 2011-13 Scion tC features their patented muffler with straight-through and multi-core technology designed to unleash hidden horsepower. Scion tC's benefit from the rear section Borla's increased exhaust velocity that adds power, driving excitement, fuel economy and a distinctive Borla exhaust note respected by motoring enthusiasts everywhere. Each axle back exhaust system is built from 304 stainless steel to give your Scion the absolute best in performance and durability. Ultra-smooth mandrel bends ensure maximum flow and power, and precision CNC manufacturing ensures an accurate fit. Best of all, Borla stands behind every system with their Million-Mile Warranty.