Akrapovic Titanium Valved Axle-Back Exhaust for BMW 1 Series M140i & M140i xDrive (F20/F21) 2018+ OPF/GPF/PPF | Slip-On Rear Silencer/Back Box with Carbon Tailpipes | ECE Approved B58 Performance Muffler | S-BM/T/5H

Akrapovic Titanium Valve-Controlled Rear Section for BMW 1 Series M140i F20 F21 2018 onward PPF compatible

Give your B58-powered 1 Series the soundtrack and response it deserves with this premium titanium rear silencer and carbon-fibre tip set. Crafted by Akrapovic, this lightweight valve-controlled axle-back transforms tone, sharpens throttle feel and trims mass, all while keeping refinement for daily use on OPF and GPF equipped cars from 2018 onward, including xDrive.

Highlights

• Full titanium construction for serious weight saving and heat resistance
• New-generation carbon-fibre tailpipe finishers that elevate the rear end
• Electronically actuated valve integrates with factory drive modes for quiet cruising and a harder-edged note when you want it
• Adjustable acoustic reflector ahead of the tips to fine tune in-cabin presence
• Engineered specifically for 2018+ petrol particulate filter models, rear-wheel drive and xDrive

Measured gains

• Power increase: +6.5 kW at 4900 rpm
• Torque boost: +16.2 Nm at 3800 rpm
• Weight reduction: 4.4 kg versus the factory rear section

The result is a cleaner, deeper tone with no unwanted drone, a freer-revving B58 and a noticeable lift in response. Civil on the motorway, purposeful when you open it up.

Why we recommend it

We have fitted and used this system at MJ Modifications and customer feedback has been outstanding. Owners love the build quality, perfect fitment, carbon tips and the way the sound matures without becoming intrusive. If you want a titanium back box that looks special, sounds right and is built to last, this is the one.

Compatibility

• BMW 1 Series M140i and M140i xDrive, F20 and F21, OPF and GPF models, 2018 onward
• Compatible with factory tow bar
• Not suitable with BMW M Performance rear diffuser

Approvals and installation

• ECE type approved
• Plug-in valve control using the car’s ECU
• Requires a single cut on the stock system at the prescribed position
• Typical install time: around 150 minutes
• Optional Akrapovic Sound Kit available separately for remote control of the valve

Professional fitting

For installation, choose MJ Modifications in Warwickshire. Email info@mjmodifications.co.uk for a fitted quote and availability.

Installation guide

Download the official Akrapovic installation guide

Part number

S-BM/T/5H

Brand and warranty

Manufacturer: Akrapovic

Warranty: Akrapovic one-year warranty

Fitment check before dispatch

We verify compatibility before shipping. Add your UK registration or the last 7 of your VIN at checkout and we will confirm this kit suits your specific F20 or F21.

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