Remus Valved Axle-Back Exhaust for BMW X4M F98 2019+ – Rear Silencer/Back Box/Muffler, Quad 84mm Carbon-Fibre Tips, Titanium-Lined, Stainless Steel, OE Valve Control – S58 3.0 Twin Turbo Performance Sports Exhaust

Transform your BMW X4M F98 with a premium rear-section performance exhaust that unleashes the S58 soundtrack while keeping everyday civility. This valved back box delivers a hard-edged, motorsport-inspired tone under load and a calmer note on the commute thanks to flap control via the car’s original electronics.

Part Number: 086219 6000+086319 1500+0046 83CTS

Key benefits

• Valve-actuated sound using the factory control unit for seamless operation
• Handcrafted in Austria with a bead-blasted finish and full stainless construction
• Quad carbon-fibre outlets, 84 mm, slash-cut with titanium inner lining for a premium look
• Reduced restriction for sharper throttle response and genuine performance potential
• Weight-saving design and precise fit for the F98 chassis
• Track-inspired character when you want it, refined cruising when you don’t

Vehicle compatibility

• BMW X4M F98, 2019 onward
• Engine: S58B30A 3.0 twin turbo, 353 kW

Why enthusiasts choose this upgrade

• Distinctive tone that enhances the X4M’s character without overwhelming daily driving
• Premium materials including carbon-fibre tips and titanium-lined internals for durability and heat resistance
• Engineered flow-path with lower back pressure to support power and torque gains
• European-made quality with attention to detail from welds to fitment

Our experience

We’ve fitted and run this system on customer cars and feedback has been consistently positive: crisper response, deeper note, and a high-end finish that elevates the rear of the vehicle. It looks as good as it sounds.

Ideal search terms

BMW X4M F98 performance exhaust, valved rear silencer, back box upgrade, quad carbon tips, 84mm tips, sports exhaust for S58, rear section exhaust, performance backbox, BMW X4M 2019-on exhaust, valve-controlled exhaust for BMW X4M.

Fitting and support

Professional installation recommended. For fitting, book with MJ Modifications in Warwickshire. Request a quote at info@mjmodifications.co.uk.