Remus Rear Sport Exhaust Silencer for BMW M340i and M440i xDrive
Upgrade your BMW with the Remus rear sport exhaust silencer, engineered for the BMW 3 Series G20 and G21 M340i xDrive and the BMW 4 Series G22 M440i xDrive. This premium axle-back performance exhaust delivers the signature Remus sound with a deeper, more aggressive tone, improved throttle response, and real-world performance gains. If you are searching for BMW M340i exhaust, BMW M440i exhaust, G20 M340i exhaust upgrade, G22 M440i exhaust upgrade, performance exhaust for BMW M340i or BMW M440i xDrive exhaust, this is the system enthusiasts choose.
Dyno tested during Remus R&D, the sport axle-back showed gains of up to +7.6 hp and +26.2 Nm with a weight saving of 2.8 kg compared to stock. Less back pressure, a larger 76 mm tube diameter, and precision flow optimisation deliver the performance edge you can feel. It retains full valve control using the vehicle’s OEM electronics for a refined drive in Comfort and an exhilarating soundtrack in Sport.
At Nforcd we have installed this exhaust on customer M340i and M440i builds and it is consistently one of the most popular upgrades. Fit, finish, and sound quality are excellent, and customer feedback has been overwhelmingly positive.
Why choose this Remus exhaust
- BMW M340i and M440i xDrive performance exhaust with genuine power and torque gains
- Deeper, more aggressive Remus sound without annoying drone
- OEM valve integration with additional BMW actuator and Y-cable included
- Shot blasted, 100 percent stainless steel construction
- Larger diameter pipework for lower back pressure and stronger mid-range
- Lightweight design with 2.8 kg saving over stock
- Hand made in Austria with precise fitment
- 24 month Remus warranty
Technical highlights
- Tube diameter: Original 70 mm. Remus 76 mm.
- Valved system: includes an additional original BMW actuator and Y-cable. Valve operation is controlled by the factory electronics.
- OPF/GPF compatible: designed for cars equipped with OEM OPF/GPF.
- Performance test results: up to +7.6 hp and +26.2 Nm. Weight saving: 2.8 kg.
Fitment and compatibility
- BMW 3 Series G20 G21 M340i xDrive 2020+
- BMW 4 Series G22 M440i xDrive 2021+
Part number: 085020 1500
Tailpipe options and related upgrades
Choose from Remus tailpipe designs to complete the look. To create a full Remus RACING cat-back system for track use, add the non-resonated GPF replacement section and the connection tube along with your preferred tailpipes.
Legal and tuning notes
The use of racing components and products without EC approval is generally not permitted on public roads. When fitting REMUS sports silencers, cat-back systems, or cat replacement pipes designed for closed-course use, an ECU remap can be beneficial to maximise performance and to avoid potential check engine lights.
Fitting, support, and compatibility check
Book professional fitting with Nforcd in Warwickshire. Request a quote at Sales@nforcd.com. For peace of mind we run a compatibility check before dispatch. Provide your UK registration or the last 7 digits of your VIN at checkout to ensure correct fitment.
Search-friendly terms customers use
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Manufacturer and warranty
Manufactured by: Remus
Warranty: 2 year Remus warranty non-transferable