Remus Valved/Active Axle-Back Exhaust for BMW F90 M5 Competition (2018+, OPF/GPF) – Rear Silencer/Back Box Mufflers with OE Valve Control, Quad 4x102mm Straight-Cut Chrome Tips – Performance Sports Exhaust for S63B44B

Remus valved axle-back system for BMW M5 F90 Competition – the ultimate sound and flow upgrade

Transform the character of your BMW M5 F90 Competition with this Remus valve-controlled rear section. Expect a deeper, more aggressive tone under load with refined manners at cruising speed thanks to the integrated flap technology that retains factory valve operation. Precision-built in Austria from 100 percent stainless steel with a shot-blasted finish, this premium rear box pair delivers improved gas flow, reduced backpressure and a noticeable weight saving over the stock set-up.

Our team has fitted this system on customer cars and on our own demonstrators. Feedback has been excellent for both sound quality and fitment. If you want a motorsport-inspired soundtrack with everyday usability, this is the one.

Why choose this exhaust upgrade

• Authentic Remus performance tone – aggressive under throttle, civil on the motorway
• Valve control retained via the car’s original actuators for seamless drive mode integration
• High-flow design for reduced restriction and sharper throttle response
• Lightweight construction for improved dynamics
• Shot-blasted, corrosion-resistant 100 percent stainless steel for long-term durability
• Handmade in Austria with superb weld quality and exact fit
• Quad 102 mm straight-cut chrome outlets for a purposeful OEM-plus look

Compatibility

BMW M5 F90 Competition with S63B44B engine, 2018 onwards. Only suitable for vehicles equipped with GPF or OPF.

Technical details

• Configuration: left and right rear silencers with integrated valve flaps
• Pipework: 84 mm
• Tip style: quad 102 mm, straight-cut, chrome
• Material: stainless steel, shot-blasted finish
• Part number: 089618 0500LR+0446 70SG

What you can expect

• Stronger exhaust note and enhanced presence without excessive cabin boom
• Optimised flow and lower backpressure
• Direct replacement rear section with precise alignment of tips

Popular search terms

BMW M5 F90 exhaust upgrade, F90 Competition valved exhaust, BMW M5 OPF axle-back, M5 quad tip muffler, S63 exhaust rear section, GPF-back performance exhaust, Remus M5 F90 back box, BMW M5 sports exhaust chrome tips, 102 mm quad outlet exhaust, BMW M5 valve-controlled mufflers, Austrian stainless steel exhaust.

Professional fitting

We recommend installation by specialists. MJ Modifications offers expert fitting and alignment in Warwickshire. To request a quote or book an appointment, email info@mjmodifications.co.uk.