Dinan 20-24 BMW M340i/M440i (G20/G22/G23/G26) Free Flow Axleback Exhaust System - Black Tips

The use of quad tips also presented some additional challenges and fostered some innovation to the already visually impressive system constructed entirely of TIG welded and brushed T304 stainless steel. Confined to dual tips, the factory system utilizes only one exhaust valve and functions by eliminating the passenger side tip when the valve is closed, siphoning all gases through the muffler and out the driver's side tip for quieter operation. With the introduction of more pipes/tips, this methodology was not practical, or desired. In true Dinan M exhaust fashion, our talented engineering team decided that integrating a second valve to the system would garner the most favorable results in both symmetry and overall sound. The result is a system that incorporates larger 76mm tubing (vs 70mm stock) and allows freer flow through the entirety of the system but specifically to both outer pipes when the enlarged valves are open. The resulting flow and sound mimics an awe-inspiring straight pipe solution with a deeper and meatier tone, a defining element of all Dinan exhausts. In contradiction to the aggressiveness resulting from open valves, when the valves are closed, all gasses are forced into the muffler for sound deadening and exit the two inner tips. Regardless of valve position, the intimate nature of the interior is retained so conversation can continue without an excessively loud drone courtesy of numerous drone abatement technologies in the can. With the Dinan exhaust equipped on the M340i/M440i you get the best of both worlds, aggressive tone/sound and civility. A combination that is a paramount to any M exhaust, and now by virtue of tip count, the M340i and M440i. Welcome to the illustrious family. Stainless Steel - Black Tips - G20 / G22 / G23 / G26

• Stock exhaust valve actuator reused and another valve/actuator added to the opposing side promoting even flow regardless of valve position
• Computer controlled exhaust valves are retained and limit noise during low speed driving and open fully during high-load conditions
• Twin exhaust valves are a whopping 76mm diameter, making them 30% less restrictive than the OE valves
• Quad 4" diameter clamp-on, double-walled, ceramic black and laser engraved exhaust tips
• Easy bolt-on installation with included mounting hardware
• Larger diameter piping for increased flow (76mm vs 70mm)
• More Power: + 6 HP @ 6600 RPM, + 5 LB-FT @ 6600 RPM
• 100% 304 stainless steel construction
• 4 lbs lighter than the stock system
• Enjoyably louder, sportier sound

Fitment:
2020 BMW M340i
2020 BMW M340i xDrive
2021 BMW M340i
2021 BMW M340i xDrive
2021 BMW M440i
2021 BMW M440i xDrive
2022 BMW M340i
2022 BMW M340i xDrive
2022 BMW M440i
2022 BMW M440i Gran Coupe
2022 BMW M440i xDrive
2022 BMW M440i xDrive Gran Coupe
2023 BMW M340i
2023 BMW M340i xDrive
2023 BMW M440i
2023 BMW M440i Gran Coupe
2023 BMW M440i xDrive
2023 BMW M440i xDrive Gran Coupe
2024 BMW M340i
2024 BMW M340i xDrive
2024 BMW M440i
2024 BMW M440i Gran Coupe
2024 BMW M440i xDrive
2024 BMW M440i xDrive Gran Coupe
2025 BMW M340i
2025 BMW M340i xDrive
2025 BMW M440i
2026 BMW M340i
2026 BMW M340i xDrive
2026 BMW M440i


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