Introducing the dAHLer High-Performance Exhaust System for the BMW F97 X3M and F98 X4M — the ultimate sound upgrade for drivers who want their high-performance M SUV to finally deliver the aggressive, motorsport-inspired tone worthy of the S58 engine. Whether you prefer a controlled, premium sound for daily driving or a sharper, more explosive note under load, this exhaust system transforms the acoustic character of the X3M/X4M without sacrificing refinement or long-distance comfort.

The S58 is BMW’s most advanced modern M straight-six — and the dAHLer system unlocks its true voice. Designed in Switzerland and handcrafted in Germany from high-quality 1.4301 stainless steel, this exhaust delivers a deeper, fuller, more motorsport-balanced tone that elevates the SUV driving experience. In Comfort mode, the note remains refined and composed; activate Sport/Sport+ or open the valves using the optional IP68-rated dAHLer Valve Controller, and the exhaust develops into a sharper, more aggressive soundtrack with punch, clarity, and emotion. 

Despite the dramatic increase in character and intensity, the system maintains zero drone at highway speeds, making it perfectly suited for daily commuting, spirited driving, and long road trips — a hallmark of dAHLer engineering.

Equipped with a high-flow, dual valve-controlled performance muffler and precision-engineered piping, the dAHLer system works seamlessly with the factory twin-valve configuration of the X3M/X4M. The OEM actuators are fully retained, ensuring factory valve behavior remains intact while the system significantly enhances overall sound depth, clarity, and responsiveness. After extensive real-world testing across S58-powered M models, this exhaust delivers one of the most refined and rewarding sound upgrades available for the X3M/X4M 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. 

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 F97 X3M and F98 X4M 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 X3M/X4M 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.

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.

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.