The MagnaFlow 2002-2008 Audi A4 Quattro Touring Series Cat-Back Performance Exhaust System is the perfect partner for your 1.8L, 2.0L 2002-2008 Audi A4 Quattro to take on a grand tour or a weekend cruise thanks to the powerful, resonant exhaust note and dyno-proven performance it brings to the table. This durable, corrosion resistant stainless steel exhaust kit is engineered to conquer the miles with ease while enhancing your driving experience with Moderate exterior and Mild interior sound levels generated through its fast-flowing, mandrel bent 2.5in. main piping and 4 Straight-Through muffler that terminate in a Dual Split Rear exit with 4in. Polished Welded-On Double Wall Angle Cut Rolled Edge tips. 16601 features a cat-back layout design to replace your import's stock exhaust components from the catalytic converter on back. This Audi A4 Quattro exhaust system is compatible with 2002-2008 engines. The use of extensive 3D scans made during the development process has resulted in an easy-to-install, direct-fit design that fits your Audi A4 Quattro like a glove. 16601 is produced using CNC precision robotic manufacturing techniques and is backed by MagnaFlow's limited lifetime construction warranty.