BMW 1 Series M140i & M140i xDrive F20 F21 B58 Genuine BMW M Performance Axle-Back Exhaust Rear Silencer/Muffler Back Box | Carbon or Chrome M Tailpipes | OEM Fit 2016+

Genuine BMW Sports Rear Silencer for M140i F20 F21 B58 with Carbon or Chrome M Tailpipe Trims

Transform the soundtrack of your B58 straight six with BMW’s factory sports rear section. This genuine rear box is a direct-fit OE upgrade for the 1 Series M140i and M140i xDrive, delivering a deeper, richer note and a more engaging drive while keeping long‑journey refinement. Choose premium carbon fibre M tips or classic bright chrome M tips for a perfect OEM+ finish that looks as good as it sounds.

Key benefits

• Original BMW accessory for precise OE-spec fit on F20 and F21 M140i and M140iX models
• Clean, bassy straight six tone with no harsh cabin boom
• Smoother flow characteristics for a sharper throttle feel
• Stainless construction and BMW durability testing for long service life
• Tailpipe choice to suit your build carbon fibre M logo trims or polished M logo trims
• Supplied with sleeve clamp and valve blanking plug for a tidy, straightforward install
• Perfect alignment and OEM hanger positions for a hassle-free fit

We run this system on customer cars and it never disappoints. Owners love the factory-quality tone, the subtle cold start bark and the premium look from the M tips. If you want a quality sound upgrade without aftermarket compromise, this is the one to have.

Compatibility

• BMW 1 Series F20 LCI M140i and M140i xDrive 5-door hatch B58 engine
  • From 2016 onwards
• BMW 1 Series F21 LCI M140i and M140i xDrive 3-door hatch B58 engine
  • From 2016 onwards

What is included

• Genuine BMW sports rear silencer assembly
• Pair of M logo tailpipe trims in your chosen finish carbon fibre or chrome
• Sleeve clamp and valve blanking plug

Part numbers

• 18302425908-18302286251 Chrome tailpipe
• 18302425908-18302286255 Carbon tailpipe

Fitting and installation

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

Compatibility check before dispatch

We will confirm suitability using your UK registration or the last 7 digits of your VIN before shipping. Add your vehicle details at checkout for a quick fitment check.

Manufactured by

BMW Genuine M Performance Parts

Warranty

Two years manufacturer warranty for UK customers and one year for international customers when a valid VIN is provided at checkout on compatible vehicles.

Why buy this rear section

Factory engineered sound, OE reliability and a premium finish. This direct replacement rear muffler keeps everything BMW intended and adds the character your B58 deserves. It is a bolt-on upgrade that looks stock, aligns perfectly with the diffuser and enhances the driving experience every time you press start.

Search-friendly terms customers use

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Order with confidence for fast dispatch and specialist support from MJ Modifications.