dAHLer High-Performance Exhaust System | For G2x M340i, M440i
dÄHLer Competition Line is a Swiss-based BMW tuning specialist, delivering high-performance upgrades and precision-engineered accessories since 1996. With performance solutions for BMW, BMW M, Plug-in Hybrid, and Mild Hybrid models, dÄHLer transforms every vehicle into a truly ultimate driving machine.
$7,969.00
Product Information
DÄHLER HIGH-PERFORMANCE EXHAUST – UNLEASHING THE ICONIC BMW INLINE-6 SOUND
Introducing the dAHLer High-Performance Exhaust System for BMW G2x M340i/M440i models — the perfect upgrade for owners who want their modern 3 and 4 Series to finally sound like a true BMW straight-six. Whether you enjoy a smooth, refined inline-6 purr or a sharper, more expressive performance tone, this system transforms the character of the B58 engine without sacrificing comfort, drivability, or everyday usability.
What sets the dAHLer system apart is the way it amplifies the natural sound qualities of the B58 inline-6. Designed in Switzerland and manufactured in Germany, the exhaust brings out the smoothness, depth, and signature straight-six growl that BMW fans love — delivering a fuller, richer tone that dramatically enhances the driving experience. In Comfort mode, the sound remains composed and understated; switch to Sport or fully open the valves using the optional dAHLer Exhaust Valve Control Module, and the exhaust develops into a sharper, more aggressive soundtrack that truly brings the B58 to life.
Despite the more dramatic sound, the system retains excellent refinement during daily driving with no drone at highway speeds — a hallmark of dAHLer engineering.
Equipped with a high-flow, double valve-controlled performance muffler, precision-engineered piping, and an included second OEM-style exhaust valve actuator, the dAHLer system integrates seamlessly with the factory valve control system. OEM functionality is fully preserved, yet the sound and character elevate far beyond stock. With years of real-world testing across B58 platforms, the result is one of the most satisfying and complete inline-six sound upgrades available.
While the installation of the dAHLer High-Performance Exhaust System is possible to do on your own, it is highly recommended that you use a professional. Improper installation practices may result in poor performance or even damage to your vehicle, and dAHLer will not be responsible for any such issues.
KEY FEATURES
- Authentic, deeper, richer straight-six sound — the way the B58 engine should have sounded from factory.
- High-flow, double valve-controlled stainless-steel performance muffler.
- Converts the factory single-valve setup into a true dual-valve exhaust system, creating a far more noticeable difference between closed-valve refinement and open-valve aggression.
- No drone at highway speeds — engineered specifically for modern BMW inline-six models.
- Seamless factory-valve integration for Comfort/Sport/Sport+, with one additional OEM BMW actuator and plug-and-play wiring included.
- Quad 90mm matte black dAHLer exhaust tips replace the factory finishers for a more aggressive appearance.
- Uses factory hangers and slip-fit joints for straightforward installation.
- Fits the stock BMW M340i/M440i rear diffuser.
- Built from high-grade materials for longevity and durability.
- Manufactured in Germany in an ISO 9001:2015 certified facility.
- Tested extensively on street, track, and the unrestricted Autobahn.
- Noticeably deeper exhaust tone and improved responsiveness.
- TUV approved and EPA compliant (USA – all states).
- Compatible with all G2x M340i/M440i rear wheel drive and xDrive models, with or without OPF/PPF.
- No check engine lights – no coding, reprogramming, or ECU modification required.
- Optional dAHLer Exhaust Valve Control Module (single valve version required).
- 3-year worldwide warranty.
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EXPERIENCE THE SOUND
ADDITIONAL INFORMATION
With dAHLer High-Performance Exhaust System, you won't need to worry about any check engine lights or reprogramming your car. This system works seamlessly with all G2x M340i/M440i models, with or without OPF/PPF.
For those who want to be in full command of the exhaust sound at any time, dAHLer offers an optional exhaust valve controller module for M340i/M440i models, which can be found here.
The product images shown are for demonstration purposes only and may not represent the exact design of the exhaust system.
The product images shown are for demonstration purposes only and may not represent the exact design of the exhaust system.
SAFETY INFORMATION
All dAHLer performance sports exhaust systems for BMW models are thoroughly evaluated on the street, track and unrestricted German Autobahn.
Each of dAHLer performance sports exhaust system are manufactured in Germany at an ISO 9001:2015 certified facility and tested by the German TUV according to the latest regulations to fulfill the highest standards.
Each of dAHLer performance sports exhaust system are manufactured in Germany at an ISO 9001:2015 certified facility and tested by the German TUV according to the latest regulations to fulfill the highest standards.
VEHICLE MANUFACTURER WARRANTY AND EMISSIONS DISCLAIMER
dAHLer Competition Line makes no guarantees to the lawfulness of any parts used for “on highway vehicles” and accepts no responsibility for compliance with the vehicle’s OEM warranty.
Models
- 3 Series / G20 / G21 (2019+) / M340i / M340i xDrive
- 4 Series / G22 / G23 / G26 (2020+) / M440i / M440i xDrive
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All items listed on our website are not available for in store pick up without prior purchase. Please use the ‘Click & Collect’ option at checkout and we will let you know as soon as your order is ready.
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