The MagnaFlow Touring Series Cat-Back Performance Exhaust System 16537 16537 is the perfect partner for your 3.0L 2006-2011 BMW 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 2 Straight-Through muffler that terminate in a Dual Straight Driver Side Rear exit with 3.5in. Polished Welded-On Double Wall Angle Cut Folded Edge tips. 16537 features a cat-back layout design to replace your import's stock exhaust components from the catalytic converter on back. This BMW exhaust system is compatible with 2006-2011 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 BMW like a glove. 16537 is produced using CNC precision robotic manufacturing techniques and is backed by MagnaFlow's limited lifetime construction warranty.