REMUS OPF/GPF-Back Valved Exhaust Rear Section for BMW M4 G82 (2021+) Competition S58 | Active OE Valve Control | Quad 102mm Chrome Angled Straight-Cut Tips | Performance Sports Backbox/Axle-Back Rear Silencer Upgrade

Transform the soundtrack and response of your BMW M4 G82 with this OPF-back valved rear section, engineered for the 2021 onwards S58B30A 375 kW model. This premium rear exhaust upgrade retains the factory electronic flap control, delivers a fierce motorsport tone under load and remains civil on the motorway when valves are closed. A true performance rear silencer for those who want sharper throttle feel, reduced backpressure and a refined yet assertive note.

Built to a stunning standard with a shot-peened style finish and full stainless construction, this Austrian-crafted system is designed for long-term durability, precise fit and a serious visual upgrade. The quad 102 mm polished chrome, angled straight-cut outlets fill the diffuser perfectly for that unmistakable M look.

Ideal search terms and what you are getting

• BMW M4 G82 exhaust upgrade for S58 engine
• OPF-back valved rear section with quad 102 mm chrome tips
• Performance rear silencer and sports backbox for M4 Competition
• Active exhaust that uses the original valve motors
• High-flow rear system for deeper tone and improved flow

Why choose this system

• Ferocious, track-inspired sound when open, calm when cruising via the stock valve control
• Reduced backpressure for sharper response
• Lightweight design with precision fit to OE pipework
• Full stainless steel throughout with a resilient shot-blasted style surface
• Austrian craftsmanship for consistency and reliability
• Perfect geometry around the rear bumper with symmetrical left and right outlets

Tip style: Four 102 mm polished chrome, angled straight-cut outlets for an aggressive, motorsport finish.

Fitment: BMW 4 Series M4 G82 2021 onwards S58B30A 375 kW. The original exhaust requires a cut for installation. The system connects to the factory pipework and retains the original electronic valve actuation.

Part numbers: 081021 1300, 081021 1400, 081021 1510, 0046 70SG

We have fitted this system for customers and the feedback has been outstanding. Owners report a deeper, more characterful tone, cleaner upshifts and a premium finish that looks as good as it sounds.

Professional installation: Prefer a hassle-free fit with coding-safe valve integration and perfect tip alignment. Book fitting with MJ Modifications in Warwickshire. Email info@mjmodifications.co.uk for a quote.

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