Remus Valved Axle-Back Exhaust for BMW 1 Series F40 M135i xDrive (2019+) - Active Flap Rear Silencer/Back Box/Muffler, OE Valve Control, Twin 102mm Angled Rolled-Edge Chrome Tips, Stainless Performance Upgrade B48/B48A20E

Unlock a richer, more purposeful tone and a serious rear-end upgrade for your BMW 1 Series hot hatch with this premium axle-back rear section. Designed specifically for the BMW F40 M135i xDrive with the B48A20E engine, this valved rear silencer transforms the soundtrack while retaining full factory drive mode control. Sleek twin 102 mm angled outlets with rolled, chrome-finished tips deliver a clean motorsport look that suits the M Performance aesthetic perfectly.

Part Number: 754019 0000 + 754019 1500 + 0026 70SS

• Engineered for the F40 M135i xDrive 225 kW B48 from 2019 onward
• Integrated actuated flaps work with the original drive select settings
• Twin 102 mm polished tailpipes with angled cut and rolled edges
• High-grade stainless construction with a bead-blasted style finish for durability
• Optimised gas flow to reduce restriction and enhance response
• Lighter than the OE back box for improved balance at the rear
• Precision fit for the factory bumper cut-outs
• Crafted in Austria to exceptional standards

How it feels and sounds
Expect a deeper, more engaging note in dynamic modes and a refined, neighbour-friendly character when cruising. With valves shut, it stays civil for daily driving. Open the valves and the B48 comes alive with a crisp, motorsport-inspired tone.

Why enthusiasts choose this upgrade
Owners want a performance exhaust that keeps the OEM convenience of active valves while delivering a more exciting soundtrack and a premium finish. This rear box delivers exactly that. Our MJ Modifications team has fitted this system for multiple M135i drivers and feedback has been consistently positive on sound quality, appearance and fit.

Compatibility
- BMW 1 Series F40 M135i xDrive 225 kW B48A20E, 2019 onward

Fitting notes
The original rear section requires a cut for installation. This is standard for many performance rear silencers on the F40 platform. For professional fitting, contact MJ Modifications in Warwickshire for a quote: info@mjmodifications.co.uk.

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What you get
- Axle-back sport rear section with integrated valve units using the factory control
- Two 102 mm angled, rolled-edge, chrome-finished tailpipes

If you want a quality valved rear box that enhances tone, looks superb and integrates seamlessly with OEM electronics, this is the F40 M135i exhaust you’ve been looking for.