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BMW

Remus G8X BMW M3/M4 G80 G81 G82 G83 S58 Valved Axle-Back Rear Silencer/Back Box/Muffler – Stainless Steel Racing Exhaust, OPF/GPF Compatible – 081023 1510-4 (Competition & xDrive 2021+)

Remus G8X BMW M3/M4 G80 G81 G82 G83 S58 Valved Axle-Back Rear Silencer/Back Box/Muffler – Stainless Steel Racing Exhaust, OPF/GPF Compatible – 081023 1510-4 (Competition & xDrive 2021+)

£2,500.88
£2,632.50 £2,500.88
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Remus Rear Section Upgrade for BMW G8X S58 Models

Turn your G8X into the car it should sound like. The Remus Part No. 081023 1510-4 is a high-flow stainless steel rear silencer kit for the S58-powered BMW M3 and M4 platform, delivering an authentic motorsport tone, reduced back pressure and a quality finish that looks as good as it sounds. We run this setup on customer cars and feedback has been outstanding for sound quality, fit and refinement.

This valved performance rear section replaces the factory back box on the G80/G81/G82/G83, using the original valve motors for full integration with the driving modes. It mounts to the OEM points with a precision spherical connection and is designed to work on vehicles with or without a particulate filter (OPF/GPF).

Why enthusiasts choose this system

  • Deep, aggressive soundtrack with crisp upshift cracks and pronounced burble under load
  • Free-flowing design for lower back pressure and improved throttle response
  • Shot-blasted, 100% stainless steel construction for durability and a premium look
  • Lightweight compared with the stock rear muffler
  • Perfect fitment with factory hangers and OEM valve control via the car’s electronics
  • Handcrafted in Austria with a 24-month manufacturer warranty

Tailpipe sets sold separately

Select your preferred quad tip finish to complete the look:

Note: tips are not included with the rear section and must be purchased separately.

Fitment

  • BMW G80 M3 saloon 2021+ with or without OPF/GPF
  • BMW G80 M3 Competition and M3 xDrive 2021+ with or without OPF/GPF
  • BMW G81 M3 Touring Competition xDrive 2021+ with or without OPF/GPF
  • BMW G82 M4 coupe 2021+ with or without OPF/GPF
  • BMW G82 M4 Competition and M4 xDrive 2021+ with or without OPF/GPF
  • BMW G83 M4 Convertible Competition xDrive 2021+ with or without OPF/GPF
  • Engine: S58 3.0 twin-turbo straight-six

Technical details

  • Activation: retains OEM electronic valve actuators
  • Mounting: uses factory locations, connection tube with spherical joint
  • Tube diameter: stock Ø 70 mm, Remus Ø 76 mm

What is included

Rear section kit with valve-integrated sport silencer and connection tube package.

  • Includes components: 081021 1401 + 081023 1510

Part number

081023 1510-4

Sound and performance keywords for your build

BMW M3 exhaust upgrade, G8X rear silencer, valved muffler, OPF back box, quad exit tips, stainless steel performance exhaust, sport rear section, M4 rear box, G80 G82 sound upgrade, track-use rear muffler, Austrian engineered exhaust, performance back box for S58.

Important information

RACING use only. No ECE type approval. The original rear section requires cutting for installation. Products without EC approval are not permitted for public road use. For closed-course applications, an ECU calibration is often recommended to maximise performance and avoid warning lights.

Order with confidence

  • Manufacturer: Remus
  • Warranty: 24 months

Professional fitting

We recommend installation by our team at MJ Modifications in Warwickshire. Email info@mjmodifications.co.uk for a fitted price or to book in.

Compatibility check before dispatch

We verify suitability using your vehicle registration (UK) or the last 7 of your VIN. Add your details at checkout for a quick compatibility confirmation.

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