Remus Valved Cat-Back (Catback) Exhaust for BMW M5 F90 S63 2017-2018 - Non-Resonated Performance Sports System, Active Switchable Flaps, Quad 102mm (4") Tips, Stainless Steel - ECE/EEC Approved - Fits Non-OPF/GPF Cars

Remus Catback for BMW M5 F90 2017-2018 - Valve-Controlled, Non-Resonated, Quad 102 mm Outlets

Give your BMW M5 F90 a serious soundtrack and premium look with this Remus catback upgrade. Built in Austria from stainless steel with a shot-blasted finish, the system features switchable exhaust flaps that work with the factory controls, delivering refined cruising and a harder-edged V8 note when you want it. Non-resonated internals keep the tone raw and purposeful while intelligent flow design reduces back pressure for sharper response.

Why it stands out

• Valve-controlled sports system - retains OE drive mode functionality
• Non-resonated straight-through design for a deeper, more aggressive sound
• Stainless steel construction with shot-blasted surface for durability
• Optimised flow for reduced back pressure and improved throttle feel
• Lightweight assembly for better response and a quality fit
• Handmade in Austria with precise fitment and premium finishing
• ECE type approval for road use where applicable

Fitment and configuration

• Vehicle: BMW 5 Series M5 F90
• Years: 2017-2018
• Layout: Left and right catback sections with integrated valves
• Tailpipe diameter: 4 x 102 mm quad exit
• Power reference: 441 kW model
• Approval: EEC homologated
• PPF note: Only suitable for cars without GPF/OPF

Tailpipe options

• 4 x 102 mm angled, straight-cut, chrome finish
• 4 x 102 mm carbon sleeves with titanium inner sections

What you will hear and feel

Expect a richer cold start, fuller mid-range presence and crisp top-end clarity with no drone in comfort modes when the valves are closed. Open the valves and the V8 character becomes louder and more engaging, with a sharper edge under load. The system keeps daily drivability intact while unlocking a motorsport-inspired tone on demand.

Proven with our customers

We have fitted this setup to multiple F90 builds and customer cars and feedback has been consistently excellent. Owners love the OEM integration of the valve control, the quality of the finish and the serious uplift in sound without compromising refinement on longer journeys.

Installation

Professional fitting recommended. Book your install with MJ Modifications in Warwickshire and let our team handle everything. Request a quote at info@mjmodifications.co.uk.

Good to know

• Designed for vehicles without a petrol particulate filter
• Uses the factory valve actuators and control - no coding required

Ready to upgrade

Transform the tone and presence of your F90 with a premium European catback that looks the part and sounds even better. Order today for a high-quality, valve-controlled system with impeccable fit and finish.

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