Dinan D660-0093 - Valved Axle-Back Exhaust - 2021-2024 BMW M3/M4

Dinan - D660-0093

Dinan Valved Axle-Back Exhaust - 2021-2024 BMW M3/M4

Axle-Back Exhaust Kit; Valved; 6 Max Horsepower Gain; 5 ft.-lbs. Max Torque Gain; Stainless Steel; Polished;

The G8x M3/M4 is arguably superior in every category to its predecessor but in most, if not all, circles the biggest downfall of the platform is in the sound department. Like the F8x before it with the S55, the S58 in the current generation leaves a lot to be desired. While a step in the right direction from its forerunner the stock vocals still carry far too much rasp that do not fully articulate the refined aggressiveness typical of the brands signature performance models. Dinan corrects this weakness with a valved axle back exhaust system that elevates the tone to a deeper, more meaningful note while also delivering an extra level of amplification above and beyond its stock counterpart. Coupled with the optional middle exhaust/x-pipe for the platform an even louder, smoother, and fuller soundtrack is possible. To achieve desired sound volume and tone worthy of the G8x M3/M4 the tubing was enlarged to 76mm (vs 70mm stock) to allow freer flow, and reduce backpressure, throughout the entirety of the system. The larger piping gives way to multiple pathways as it nears the rear of the vehicle - the choice of which is utilized determined by the factory exhaust valves which are retained. When valves are closed, flow is directed into the Dinan muffler, where absorption and reactive technologies are used, and exit out the two inner tips. This limits noise during low-speed driving and produces a more subdued, albeit deeper, and agreeable note. Visually, the Dinan G8x M3/M4 exhaust has been skillfully crafted entirely out of T304 stainless steel and TIG welded for the best visual appearance and color. The Dinan exhaust includes massive, quad 4.5-inch (114mm) clamp-on, double-walled, polished stainless steel (or coated black ceramic) and laser engraved exhaust tips. Despite the seemingly cartoonish size on paper, the tips mesh seamlessly and fill the factory cut-outs to complete the OEM+ look with a healthy dose of audible attitude.

• Enjoyably Louder Sportier Sound
• Drone Abatement Technologies Used To Reduce Cabin Resonance
• [4] Diffuser Filling Of 4.5 in. Double-Walled Polished/Black Ceramic Coated Clamp-On Tips w/Laser Engraved Dinan Logo
• Larger Diameter Piping For Increased Flow [76mm Vs 70mm]
• 6-Pounds Lighter Than The Stock Axle Back [Stock - 44 Pounds vs. Dinan - 38 Pounds]
• Stock Exhaust Valve Actuators Reused And Operation Of Exhaust Valve Is Unchanged
• Exhaust Tone Can Be Adjusted Via The M-Drive Settings
• Exhaust Valves Are Retained And Limit Noise During Low-Speed Driving And Open Fully During High Load Conditions
• 100 Percent 304 Stainless Steel Construction
• Factory-Like Fitment With Included Mounting Hardware