Remus Valved Axle-Back Rear Silencer/Muffler Back Box for BMW M8 F92 (2019-) S63B44B - Quad 102mm Polished Slash-Cut Tips - Stainless Steel OE Valve Control - Left/Right Rear Boxes - Performance Exhaust Upgrade 8 Series M8 Coupe

Remus rear muffler set with factory-controlled valves and quad 102 mm polished tips for BMW M8 F92 2019 onwards

Unlock a richer, more purposeful soundtrack and a premium look for your BMW with this Remus axle-back upgrade. Designed specifically for the F92 M8 with the 441 kW S63B44B engine, this twin rear box assembly brings a deeper, motorsport-inspired tone and improved flow while keeping full integration with the car’s original electronic flap system. Expect quality you can see and hear, engineered in Austria and built to last.

• Active valve technology retains full use of the car’s factory exhaust flaps, comfort to sport at the touch of a button
• Quad 102 mm slash-cut, mirror-polished tailpipe finishers for a bold, OEM-plus appearance
• Optimised 84 mm pipework for reduced restriction and enhanced exhaust gas flow
• Full stainless construction with a bead-blasted finish for durability and a premium aesthetic
• Lower mass compared with many stock systems for a lighter rear end
• Precision fit with factory mounting points for straightforward installation
• Austrian craftsmanship, built by Remus for performance and longevity

We have run this system on our own cars and customer builds, and the feedback is consistently excellent. Confident cold starts, a fuller tone under load, and refined manners at cruise when the flaps are closed. It is exactly the upgrade M8 owners are searching for when they want theatre without fuss.

Fitment

BMW 8 Series M8 Coupe F92, 2019 onwards, 441 kW S63B44B. Axle-back configuration designed for the OE connection points and factory valve control.

Technical details

• Main tube diameter: 84 mm
• Tailpipe style: quad 102 mm, straight edged, slash-cut, chrome polished
• Material: full stainless steel, bead-blasted surface
• Configuration: left and right rear boxes with integrated valve units utilising the vehicle’s original electronics
• Part number: 089618 0500LR+0446 70SG

Installation and support

Professional fitting available at MJ Modifications in Warwickshire. Request a quote at info@mjmodifications.co.uk. We are happy to advise on compatibility, sound expectations and aftercare.

Why choose this upgrade

This Remus rear section transforms the character of the M8 with a stronger, more engaging note and improved flow while preserving day-to-day usability through the factory flaps. It is a premium, bolt-on rear box solution that elevates both performance and aesthetics.

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