Dinan 21-27 BMW M3/M4 G80/G82/G83 Valved Axleback Exhaust System with Black Tips

Through extensive development and testing nearly every possible permutation of the exhaust was attempted. Unlike the previous generation where cabin sound/drone was largely unchanged between the sedan and the coupe, that was not the case with the G8x chassis'. This caused countless iterations to be attempted in the quest for a common system that not only sounded superb externally but one that also didn't introduce an overbearing internal cabin drone on either body type. The result is a system we are confident will be coveted by all for years to come. 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. However, when the valves are open during high-load conditions the bulk of the gases bypass the muffler altogether for a near straight pipe design and maximum aural enjoyment to be achieved. It's the perfect marriage for all tastes and allows civility or impassioned aggression depending on what the situation demands. The combination is one Dinan has deemed fitting for the marques signature performance models that cater to the tasteful enthusiast who demand the best for all situations. Stainless Steel - Black Tips - G80/G82/G83

• Stock exhaust valve actuators reused, and operation of exhaust valve is unchanged so exhaust tone can be adjusted via the M-drive settings
• Computer controlled exhaust valves are retained and limit noise during low-speed driving and open fully during high-load conditions
• Four, diffuser filling, 4.5-inch (114mm) double-walled, black ceramic coated clamp-on tips with laser engraved Dinan logo
• 6-pounds lighter than the stock axle back (Stock: 44-pounds vs. Dinan: 38-pounds)
• Drone abatement technologies used to reduce cabin resonance
• Larger diameter piping for increased flow (76mm vs. 70mm)
• Factory-like fitment with included mounting hardware
• Maximum gains of +6 HP and +5 lb-ft of torque
• 100% 304 Stainless Steel construction
• Enjoyably louder, sportier sound

The Dinan 21-27 BMW M3 and M4 G80/G82/G83 Valved Axleback Exhaust System offers a perfect blend of performance, sound, and sophistication. Designed through extensive testing and development, this exhaust system ensures an exceptional auditory experience tailored for both spirited driving and daily comfort. The system features enlarged 3-inch (76mm) piping, which increases airflow efficiency and reduces backpressure, resulting in up to +6 horsepower and +5 lb-ft of torque. Crafted from 100% stainless steel with a sleek black ceramic coating on the four 4.5-inch double-walled tips, the setup provides durability and a bold appearance that complements the vehicle's aggressive stance.
The system retains the factory exhaust valve actuators, allowing control over sound levels via the M-drive settings. During low-speed cruising, the exhaust remains subdued to minimize cabin drone, utilizing advanced absorption and reactive technologies within the muffler. When higher loads are detected, the valves open, directing exhaust gases through nearly straight pathways for maximum sound and performance. This intelligent valve operation offers a customizable experience, from refined quietness to exhilarating sportiness, aligning with the preferences of discerning enthusiasts.
Installation is straightforward with factory-like fitment and included hardware, making it an ideal upgrade for owners seeking improved exhaust flow, weight reduction—6 pounds lighter than stock—and a commanding sound profile. The system's design ensures a seamless integration with your BMW M3 or M4, enhancing both performance and auditory presence without compromising comfort or legality. Whether you're looking for a subtle improvement or an aggressive exhaust tone, the Dinan Valved Axleback Exhaust System is engineered to meet the highest standards and elevate your driving experience.

Features:

• Enlarged 3-inch (76mm) tubing for increased airflow and reduced backpressure

• Retains factory exhaust valve operation with M-drive control

• Advanced drone abatement technologies to reduce cabin resonance

• Four 4.5-inch double-walled black ceramic-coated tips with laser engraving

• Maximum gains of +6 HP and +5 lb-ft of torque

• Constructed from 100% stainless steel for durability and corrosion resistance

• Lighter than stock by 6 pounds for improved weight distribution

• Factory-like fitment with included mounting hardware

• Designed to deliver a louder, sportier sound when valves are open

• Compatible with 2021-2023 BMW M3 and M4 models

Fitments:
2021 BMW M3 Base
2021 BMW M3 Competition
2021 BMW M4 Base
2021 BMW M4 Competition
2022 BMW M3 Base
2022 BMW M3 Competition
2022 BMW M3 Competition xDrive
2022 BMW M4 Base
2022 BMW M4 Competition
2022 BMW M4 Competition xDrive
2023 BMW M3 Base
2023 BMW M3 Competition
2023 BMW M3 Competition xDrive
2023 BMW M4 Base
2023 BMW M4 Competition
2023 BMW M4 Competition xDrive
2023 BMW M4 CSL
2024 BMW M3 Base
2024 BMW M3 Competition
2024 BMW M3 Competition xDrive
2024 BMW M4 Base
2024 BMW M4 Competition
2024 BMW M4 Competition xDrive
2025 BMW M3 Base
2025 BMW M3 Competition
2025 BMW M3 Competition xDrive
2025 BMW M4 Base
2025 BMW M4 Competition
2025 BMW M4 Competition xDrive
2026 BMW M3 Base
2026 BMW M3 Competition
2026 BMW M3 Competition xDrive
2026 BMW M4 Base
2026 BMW M4 Competition
2026 BMW M4 Competition xDrive

Air Freight Prohibited: false
Not Carb Approved: false
Carb Acknowledgement Required: false
Ltl Freight Required: false
Prop 65: Y
Part Type: automotive
Epa: N/A
Regular Stock: t
Units Per Sku: 1