Remus Cat-Back (Catback) Valved Exhaust for BMW M3 G80 Competition 2021+ S58 | Quad 4x102mm Chrome Rolled-Edge Tips | Stainless Performance Sport Rear Section/Backbox/Muffler | OE Valve-Controlled Quad Exit

Transform your BMW M3 G80 soundtrack and throttle response with a premium Austrian-built performance exhaust upgrade. Engineered for the S58 twin‑turbo platform, this valved quad‑exit system delivers a race‑bred tone, sharper throttle feel and stunning 102 mm polished rolled‑lip tips. It retains the factory electronic flap control for everyday usability and full roar on demand. Perfect for M3 Competition owners seeking a serious exhaust upgrade without compromising OEM functionality.

Why enthusiasts choose this system

• Race‑inspired acoustics with valves closed for civility and open for a ferocious, track‑leaning note
• Full stainless construction with a bead‑blasted finish for durability and a premium look
• Improved gas flow and reduced restriction for genuine performance benefits
• Mass‑saving design compared to stock for enhanced response
• Precision fitment tailored to the G80 platform for a clean, factory‑level install
• Beautiful quad 102 mm chromed, rolled‑edge outlets to complete the rear end
• Crafted by hand in Austria for exceptional quality and consistency

Compatibility

• BMW M3 G80, including Competition, 2021‑on
• Engine: S58
• Uses the vehicle’s original electronic valve control for seamless operation

Part number
081021 1100 + 081021 1200 + 081021 1300 + 081021 1400 + 081021 1510 + 0046 70S

Fitment notes
The factory rear section requires a cut during installation. Professional fitting is recommended.

Installation and support
Want it fitted properly first time in the UK We can install this system at MJ Modifications in Warwickshire. Email info@mjmodifications.co.uk for a fitting quote and availability.

Proven by us and loved by customers
We have installed this setup for multiple G80 owners and run it ourselves. The feedback is consistent: top‑tier build quality, a purposeful soundtrack with the valves open, and comfortable manners when cruising with the flaps closed. It is the ideal upgrade for drivers who want a serious performance exhaust for road and track while keeping factory integration.

Searches this product is perfect for
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Order with confidence
Upgrade your G80 with a hand‑built, valve‑controlled performance system that looks incredible and sounds even better. In stock options move fast. Add to basket or contact us for expert advice and installation.