Axleback Exhaust System with Dual Valve

The MAD BMW M340 M440 Axleback Exhaust System is designed to deliver a bold sound upgrade without unnecessary parts or added cost. On the G20/G22 platform, a full catback exhaust is not required because the factory midpipe is single-piece, non-restrictive, and free of cats and resonators. Replacing it offers no real performance or sound gain, making the axleback the smart focus for upgrade. This system enhances your vehicle’s sound character while retaining the factory midpipe, providing a deeper, more aggressive tone when accelerating, yet it remains refined and comfortable during regular driving. Constructed from premium 304L stainless steel, this axleback offers excellent durability and corrosion resistance for long-term performance. The system includes an upgraded dual valve setup that converts the factory single valve into a true M-style dual valve configuration, reusing the factory valve actuator and adding a second valve. This allows your exhaust to function seamlessly with OEM drive modes, remaining quiet in Comfort and fully open in Sport. Installation is simple and quick. Cutting the factory pipe is required, but the process is straightforward, and the included clamps ensure a clean, secure fit. The exhaust is available with three distinct tip options: brushed stainless, black, or carbon, allowing you to customize the look to match your build. This axle back is ideal for drivers who want a noticeable sound upgrade and strong presence without paying for parts that do not add value. Fitment includes the 2019-2024 BMW M340i and M440i, including all xDrive variants. It is also compatible with 2018 and up G20/G22 models, as well as 2025 and newer models.