Dinan Free Flow Axle-Back Exhaust System with Black Tips for BMW M550i xDrive (G30) 2018-2023

The Dinan Free Flow Axle-Back Exhaust for the BMW G30 M550i marks a new chapter in Dinan's exhaust system design. This system is engineered to improve exhaust flow, reduce back pressure, and enhance power output, delivering gains of +8 HP and +6 lb-ft of torque at 6600 RPM. While retaining the brand's hallmark balance between a civilized tone and aggressive sound under acceleration, the M550i exhaust introduces a bold new design for the exhaust tips, which are now massive 4" diameter double-walled tips. These clamp-on tips are a first for Dinan, offering easy replacement or customization options without welding.

Like other Dinan exhausts, the M550i system features drone abatement technologies to minimize cabin noise at low RPM, ensuring a quiet and comfortable interior even during high-performance driving. The computer-controlled exhaust valves retained from the stock system modulate the sound, limiting noise during low-speed driving but opening fully under load to allow free exhaust flow and deliver a deep, throaty V8 tone. The result is a refined yet sporty note that accentuates the M550i’s performance.

Constructed from 100% 304 stainless steel, this exhaust system offers durability and resistance to corrosion, ensuring long-lasting performance. The system also provides a straightforward installation with a bolt-on design, utilizing the factory hangers and including all necessary mounting hardware.

Key Features:

• Power Gains: +8 HP and +6 lb-ft of torque at 6600 RPM
• Sound: Louder, sportier sound with controlled exhaust valves to manage noise at low speeds
• Drone Reduction: Incorporates technologies to reduce low-RPM drone, keeping the cabin quiet
• Exhaust Tips: Four 4" diameter double-walled, clamp-on tips available in polished or ceramic black finishes, laser engraved with the Dinan logo
• Material: 100% 304 stainless steel for durability and corrosion resistance
• Installation: Easy bolt-on installation with included hardware, using factory hangers for a seamless fit