Remus Valved Axle-Back Exhaust for BMW 8 Series M8 F92 Competition (2019+) - Rear Silencer/Back Box with OEM Valve Control, Quad 102mm Carbon Fibre Tips, Titanium Internals, Stainless Steel - S63B44B 460kW Sports Muffler

BMW M8 F92 Competition rear section upgrade with valve control and quad carbon fibre tips

Transform the character of your BMW 8 Series M8 Competition F92 with a premium rear section that delivers a deeper, motorsport-inspired soundtrack, sharper throttle response and a serious visual statement. This valved rear silencer retains factory electronics for seamless drive mode integration while the quad 102 mm carbon fibre, slash-cut tailpipes with titanium inner construction complete the look with an unmistakable high-end finish.

Engineered for the S63B44B 460 kW twin-turbo V8, this performance rear box uses a free-flowing 84 mm layout to reduce restriction and enhance exhaust gas velocity. Crafted from full stainless steel with a bead-blasted surface, it is lightweight, durable and built to fit precisely on the OEM mounting points. Handmade in Austria to exceptional standards.

Why enthusiasts choose this rear box

• Valve-controlled soundtrack that works with the factory drive modes for authentic comfort-to-sport character
• Rich, aggressive tone under load with a refined note at cruising speeds
• Quad 102 mm carbon fibre tailpipes, angled for a purposeful, race-ready appearance
• Titanium internal components for strength, heat resistance and a crisp acoustic signature
• 84 mm free-flowing design for reduced backpressure and improved response
• Lightweight construction to trim mass at the rear of the car
• Precision fit for a straightforward install and factory-like alignment
• Full stainless steel build with shot-blasted finish for long-term corrosion resistance
• Handmade in Austria with meticulous attention to detail

Ideal for

Drivers seeking a high-quality axle-back upgrade, valved muffler solution, performance back box or sports exhaust for the BMW M8 Coupe F92. Perfect if you want a plug-and-play valve setup, a deeper V8 tone and quad carbon fibre exits without compromising everyday usability.

Technical details

• Vehicle: BMW 8 Series M8 Competition F92, S63B44B, 460 kW, 2019 onwards
• Configuration: Left and right rear silencer with integrated valve control compatible with OEM electronics
• Tailpipes: 4 x carbon fibre, 102 mm diameter, angled
• Piping diameter: 84 mm
• Material: 100 percent stainless steel, shot-blasted finish with titanium internals
• Part number: 089618 0500LR+0446 70CS

What our customers say

We have installed this system for M8 owners and feedback has been consistently excellent. Customers love the deeper cold start, the ferocious wide-open throttle note and the premium carbon tailpipe finish, all while keeping factory valve functionality.

Professional fitting available

For installation, book with MJ Modifications in Warwickshire. Email info@mjmodifications.co.uk to request a fitting quote.

Search-friendly terms

BMW M8 F92 exhaust upgrade, valved rear box, sports muffler, axle-back system, performance backbox, quad carbon tips, carbon fibre tailpipe set, titanium internals, stainless steel exhaust, S63 V8 exhaust, UK performance exhaust supplier.