Remus Valved Axle-Back Rear Silencers/Backboxes for BMW 5 Series M550i xDrive G30/G31 (2017+) - Quad 102mm Tips - Stainless Steel - ECE Approved - Active Valve V8 Exhaust - Non-OPF/GPF

Premium rear boxes with quad 102 mm outlets for BMW M550i xDrive G30 G31

Unlock the V8 soundtrack your G30 or G31 has been missing with this Austrian engineered pair of active rear mufflers. Designed as a direct replacement for the factory back boxes, these stainless units plug into the original flap control so you get a calm, refined note in comfort and a deeper, more assertive tone in sport modes. Expect reduced back pressure for sharper response, stunning shot blasted finish, and a precision fit that complements the M550i’s OEM look with four 102 mm tips.

Key reasons enthusiasts choose this setup

• Works with the car’s existing exhaust flap electronics for seamless valve operation
• Richer, sportier acoustics when you want excitement, discreet when you do not
• Lower back pressure for a crisper throttle feel
• Full stainless construction with a high quality surface treatment for durability
• Crafted in Austria with meticulous attention to fit and finish
• ECE homologated for road use where applicable

Compatibility

• Vehicle: BMW 5 Series M550i xDrive
• Chassis: G30 saloon and G31 touring
• Model year: 2017 onwards
• Power: 340 kW
• Only suitable for cars without a petrol particulate filter, non GPF

Tailpipe styles, 4 x 102 mm

• Angled, straight cut, high gloss chrome
• Angled, rolled edge, high gloss chrome
• Carbon fibre outer with titanium inner, angled

What is included

Left and right rear boxes with integrated flaps that retain factory valve control, plus your choice of four 102 mm tip finishers. The ideal backbox upgrade for those searching for BMW M550i sound upgrade, G30 performance exhaust UK, G31 touring quad exit, V8 sports mufflers, active flap exhaust, ECE approved rear section, stainless performance backboxes, or BMW quad tips.

Real world feedback

We have installed this system on customer M550i xDrive cars and the response has been excellent. Owners praise the enhanced tone, the premium appearance, the OE level fit, and the way the valves keep things civil for daily use while delivering a proper performance growl when pressing on.

Installation and support

Professional fitting available at MJ Modifications in Warwickshire. For a fitting quote or product advice, email info@mjmodifications.co.uk. We can help you choose the perfect tip style and confirm suitability for your specific G30 or G31.

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