Remus BMW M3 G80 & M4 G82 Racing Downpipe-Back Valved Exhaust System (M3/M4 Competition, 2021+) - Stainless Steel, GPF/OPF Compatible, Performance Track Use

Remus Racing Valve-Controlled Downpipe-Back System for BMW M3 G80 and BMW M4 G82

Unlock the true character of the S58 with this Austrian‑built Remus downpipe‑back system. Crafted from premium stainless steel with enlarged 76 mm pipework and switchable valves, it delivers a harder‑edged motorsport tone and sharper response while remaining OPF friendly. Ideal for G80 M3 and G82 M4 owners who want a serious track‑focused upgrade with OEM‑style valve integration and impeccable fit and finish.

We have run this system ourselves and supplied it to many M3 and M4 drivers. Feedback on sound quality, build and fitment has been outstanding. If you are chasing a big‑bore, valve‑controlled race system that transforms your BMW without compromise, this is the one.

Why this Remus system stands out

• Valve‑controlled sound profile, aggressive when open, refined when closed
• Large 76 mm tubing for reduced restriction and improved throttle response
• Shot‑blasted stainless steel for durability and a premium finish
• Lightweight design with precision fit at factory mounting points
• Handmade in Austria with exceptional weld quality
• Factory electronics retain full valve functionality via original actuators
• Spherical connections for reliable sealing and easy installation
• 24 month Remus manufacturer warranty

What is included

Complete racing downpipe‑back kit for BMW M3 G80 and BMW M4 G82 models, including Competition variants, compatible with cars with or without GPF/OPF. The package comprises:

• Remus Racing centre section
• Connection tube package with integrated valves
• Secondary catalyst replacement tube for EU vehicles
• Tailpipe set is optional and sold separately

Tailpipe options

• Stainless Steel Chromed Angled Rolled Edge Ø 102 mm
• Stainless Steel Chromed Angled Straight Cut Ø 102 mm
• Stainless Steel Chromed Straight Cut with Carbon Insert Ø 98 mm
• Stainless Steel Black Chrome Straight Cut with Carbon Insert Ø 98 mm
• Carbon Tail Pipe Set with Titanium Internals Ø 102 mm

Pipe diameter

• Original: 70 mm
• Remus: 76 mm

Vehicle compatibility

• BMW M3 G80 2021+ with or without GPF/OPF
• BMW M3 G80 Competition 2021+ with or without GPF/OPF
• BMW M4 G82 2021+ with or without GPF/OPF
• BMW M4 G82 Competition 2021+ with or without GPF/OPF

Track use and important notes

RACING product. No ECE type approval. Use on public roads is generally not permitted. The original exhaust requires cutting for installation.

For track‑only parts such as sports silencers, cat‑back assemblies and cat replacement sections, an ECU calibration is recommended to maximise performance and help prevent a check engine light.

Fitting and support

Professional installation is recommended. MJ Modifications offers fitting in Warwickshire. Request a quote or book your slot by emailing info@mjmodifications.co.uk.

Compatibility check

We will verify fitment before dispatch. Please provide your UK registration or the last 7 digits of your VIN at checkout.

Part number

081021 1100 + 081021 1200 + 081021 1400 + 081021 1510

Manufacturer and warranty

Manufacturer: Remus

Warranty: 24 months, non‑transferable

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Why choose it

Bigger bore tubing, precision valves and meticulous construction combine for a deep, assertive soundtrack and a noticeable step up in response. Customers love the tone and finish, and so do we. If you want your G80 or G82 to feel and sound like a genuine track machine while keeping factory valve control, this Remus racing system is the upgrade to beat.