Remus Valved Axle-Back Rear Muffler/Back Box for BMW 4 Series G22 M440i xDrive (B58) 2019-on – Quad 84mm Straight-Cut Carbon Fibre Tips | OE Valve Control | Stainless Sports Exhaust Rear Silencer Upgrade

Performance rear section for BMW 4 Series G22 M440i xDrive 3.0 B58 2019-on

Transform the soundtrack and presence of your G22 M440i with a premium valved rear exhaust upgrade featuring quad 84 mm straight-cut outlets with carbon fibre inserts. This precision-made system retains factory flap control for seamless operation through your drive modes while delivering a deeper, more aggressive tone and reduced backpressure for improved response.

We have fitted this system on customer cars and the feedback has been outstanding. Expect a richer note in Sport while remaining civil in Comfort. The craftsmanship, fit and finish are exactly what you want from a high-end European exhaust upgrade.

Why choose this upgrade

• Deep, motorsport-inspired sound with valve control retained via the factory actuators
• Stainless steel construction with a shot-blasted finish for durability and a premium look
• Reduced backpressure for sharper throttle response
• Lighter than the standard rear section
• Perfect fit on the G22 platform with precision-made pipework and hangers
• Handmade in Austria for exceptional build quality

Tailpipe design

Quad 84 mm straight-cut tips with carbon fibre inserts deliver an unmistakable aesthetic upgrade. The twin each side layout fills the rear valance perfectly and complements the M styling package.

Compatibility and notes

• Vehicle: BMW 4 Series G22 M440i xDrive, B58B30B, 275 kW, 2019-on
• The original exhaust will need to be cut during installation
• Only suitable for cars with the M Sport package and in combination with the original rear diffuser of the BMW M340i G20 (BMW part no. 51 12 8 069 391)

Part number

085020 0000 + 085020 1500 + 0046 83C

Fitting service

Professional installation recommended. MJ Modifications in Warwickshire can supply and fit this system. Request a fitting quote at info@mjmodifications.co.uk.

SEO friendly highlights

BMW M440i exhaust upgrade, G22 rear silencer, valved sports back box, quad tip carbon tailpipes 84 mm, B58 performance exhaust, M440i xDrive rear section, stainless steel performance exhaust, carbon fibre exhaust tips, BMW 4 Series G22 tuning parts, plug-in factory valve control, premium Austrian-made exhaust, lightweight rear exhaust, aggressive sound upgrade for M440i.