Dinan Freeflow Axleback Exhaust System | BMW 550i xDrive (11-16) (D660-0036)

The Dinan 11-16 BMW 550i xDrive Freeflow Axleback Exhaust System is a high-performance exhaust upgrade designed to enhance exhaust flow and vehicle sound. Constructed entirely from stainless steel, this system reduces back pressure to increase power output while delivering a sporty, aggressive exhaust note that remains civilized during normal driving. It features a vacuum-controlled butterfly valve to optimize flow at wide-open throttle, ensuring maximum performance without drone or noise issues. The design also reduces overall weight and includes 3.5-inch polished or ceramic black tips for a refined, high-performance appearance. Built with precise specifications, this exhaust system guarantees a proper fit using factory hangers and offers long-lasting corrosion resistance.

This axleback exhaust system is compatible with 2011–2016 BMW 550i xDrive models. It is a direct bolt-on replacement designed for street and performance driving, providing an upgrade in both sound and power. The kit includes all necessary components for installation and is intended for enthusiasts seeking improved exhaust flow, a more aggressive sound, and a high-quality finish. Suitable for daily driving or spirited performance, this system enhances the vehicle’s overall driving experience with durable materials and a tasteful, high-performance aesthetic.