• Clamp-On Quad 4 in. Tips
• Mounting Hardware

The Dinan D660-0079-BLK Free Flow Axle-Back Exhaust is engineered to amplify the F90 M5's sound characteristics while preserving the refinement expected from a high-performance luxury sedan. Built from 100% T304 stainless steel with 83mm piping, the system offers reduced backpressure and a sportier tone while retaining stock exhaust valve control for dynamic sound adjustment. A signature Dinan muffler design using absorption and reactive technologies helps reduce drone while maximizing flow and power output.

Dinan D660-0079-BLK Free Flow Axle-Back Exhaust Features:

• More Power: +6 HP and +5 ft-lb of Torque
• Enjoyably Louder, Sportier Sound
• Four Massive 4 in. Diameter Clamp-On, Double-Walled, Black Ceramic Coated and Laser Engraved Exhaust Tips
• 100% 304 Stainless Steel Construction
• Larger Diameter Piping for Increased Flow (83mm vs 80mm)
• Stock Exhaust Valve Actuators Reused, Exhaust Tone Adjustable via M-Drive Settings
• Computer Controlled Exhaust Valves Retained for Adaptive Sound Control
• Twin 76mm Secondary Exhaust Valves – 30% Less Restrictive than OE
• Easy Bolt-On Installation with Included Mounting Hardware

Emissions Note:

This part is legal for sale or uses on Emissions Controlled Vehicles, Uncontrolled (Non-Emissions Controlled) Vehicles, and Racing Use Only Vehicles because it does not affect vehicle emissions and is not covered by emissions regulations.

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