dAHLer High-Performance Exhaust System | For G01 X3 M40i, G02 X4 M40i
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.
$8,189.00
Product Information
DÄHLER HIGH-PERFORMANCE EXHAUST – UNLEASHING THE ICONIC BMW INLINE-6 SOUND
Introducing the dAHLer High-Performance Exhaust System for BMW G01 X3 M40i and G02 X4 M40i models — the ultimate upgrade for owners who want their performance SUV to finally sound like a true BMW straight-six. Whether you prefer a smooth, refined inline-6 purr during everyday driving or a sharper, more expressive performance tone when you open it up, this system transforms the character of the B58 engine without compromising comfort, practicality, or daily usability.
What sets the dAHLer system apart is the way it amplifies and enriches the natural voice of the B58 inline-6. Designed in Switzerland and manufactured in Germany, the exhaust delivers the smoothness, depth, and signature straight-six growl that enthusiasts expect — but with the added presence, fullness, and authority that an M40i-badged SUV deserves. In Comfort mode, the sound remains composed and understated; switch to Sport or open the valves using the optional dAHLer Exhaust Valve Control Module, and the exhaust develops into a deeper, sharper, more aggressive soundtrack that brings the B58 to life in a much more immersive way.
Despite the dramatically enhanced sound, refinement remains exceptional. The system maintains no drone at highway speeds, making it perfectly suited for long-distance touring, family use, and everyday driving — 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 preserved completely, yet the sound and responsiveness are elevated far beyond stock. After extensive real-world testing across B58-powered SUVs globally, this remains one of the most complete and satisfying inline-six sound upgrades available for the M40i platform.
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 BMW performance SUVs.
- 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 X3/X4 M40i rear diffuser on both pre-LCI and LCI models.
- 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 G01 X3 M40i and G02 X4 M40i 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 G01 X3 M40i and G02 X4 M40i 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 X3/X4 M40i 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
- X3 Series / G01 (2018+) / X3 M40i
- X4 Series / G02 (2018+) / X4 M40i
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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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