The MagnaFlow Audi S4 Touring Series 15599 brings enhanced engine sound and dyno-proven performance to your 3.0L 2010-2016 Audi S4 with a healthy helping of our deep, resonant signature exhaust note at Moderate exterior and Mild interior sound levels. Thanks to its durable, corrosion resistant stainless steel design, this Audi S4 exhaust system will handle whatever tarmac you decide to leave your mark on. This performance exhaust kit features a crossmember-back layout designed to replace your Audi S4’s exhaust system from the crossmember on back. With its fast-flowing, mandrel bent 2.25in. main piping and 3 Straight-Through muffler ending in a Quad Split Rear exit with 3.5 Polished Welded-Double Wall-Angle Cut-Folded Edge tips, your muscle car will be sounding as awesome as it looks. Extensive 3D scanning during development has resulted in a direct-fit design that you can easily install yourself. 15599 is produced using CNC precision robotic manufacturing techniques and is backed by MagnaFlow’s limited lifetime construction warranty.