Introducing the dAHLer RedLine Exhaust System for the BMW G80 M3 Sedan, G81 M3 Touring, G82 M4 Coupe and G83 M4 Cabrio - the perfect upgrade for those who crave more from their driving experience. With its high-performance muffler, bespoke H-pipe and two exhaust valves, this system delivers a more aggressive and impressive sound, without compromising on liveability for daily driving.

But what sets the dAHLer RedLine apart from other performance exhaust systems on the market? For one, it is specifically designed by dAHLer engineers to enhance the sound of your G8x M3/M4 while still preventing any annoying drone at highway speeds. The bespoke H-Pipe, included with the system, replaces the stock rear resonator to unlock a smooth, pleasing tone out of the S58 engine.

And that's not all. The high-flow, valve controlled, stainless-steel performance muffler adds even more power to your ride. The dAHLer RedLine exhaust system improves the overall driving experience, with an exhilarating sound and small bump in performance. You'll love the way it feels and sounds, whether cruising around town or pushing your car to the limit on the track.

So, what can you expect from the dAHLer RedLine exhaust system? Under normal driving conditions, the valve-controlled performance muffler stays closed, as operation of exhaust valves is unchanged, ensuring a discreet and unassuming ride. However, once the valves are opened and you hit the throttle, you'll unleash a menacing growl that will make you the envy of all your fellow drivers.

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 M3/M4. 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 G8x M2/M3/M4 platform.

While the installation of the dAHLer RedLine 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 Redline Exhaust System, you won't need to worry about any check engine lights or reprogramming your car. This system works seamlessly with all rear wheel drive and M xDrive models, and cars 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 the G8x M3/M4, which can be found here.

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 for BMW models 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.