Milltek Sport Rear Silencer Bypass (Non-Valved) with GT-90 Polished Tips for BMW 125i F20/F21 (B48, 2016+) Rear Box Delete, Louder Exhaust, Fits M135i Valance, 3/5 Door Hatch

Milltek Sport axle-back muffler delete with 90 mm mirror polished tailpipes for BMW 125i F20 F21 2016 onwards

Give your 1 Series the soundtrack it deserves with this UK-built Milltek Sport axle-back upgrade. Replacing the rear silencer with a free-flow rear section delivers a more assertive, motorsport-inspired tone, sharper character and a premium twin-tailpipe look. It suits cars running the M135i rear diffuser and fits both three-door and five-door models from 2016 onward.

Why enthusiasts choose this Milltek rear section

• Axle-back muffler delete for a deeper, crisper note and a more engaging drive
• Twin 90 mm mirror polished tips for an OEM plus finish that fills the bumper perfectly
• Compatible with the M135i rear diffuser for a factory-style twin exit aesthetic
• Precision UK construction in 304-grade stainless steel for durability and corrosion resistance
• Smooth, constant-diameter pipework to encourage better gas flow and response
• Refined on the motorway with minimal cabin boom, yet purposeful when you want it
• Designed specifically for the BMW 125i F20 F21 2016 onwards

Real feedback from road and customers

We have installed this Milltek rear section on customer cars and our own builds. The reaction is the same every time. Stronger start-up bark, a richer tone through the revs and classy polished tails that complete the rear end. Owners report a more exciting drive without unwanted harshness day to day. If you have been searching for a quality muffler delete, backbox removal, rear section upgrade or axle-back system for your 125i, this is a proven choice that sounds right and looks right.

Build quality you can trust

Milltek Sport manufacture in the UK using high quality 304 stainless. The system is hand finished with consistent welds and carefully chosen pipe sizing for a lively, responsive feel. Acoustic development focuses on a sporty soundtrack with everyday refinement.

Compatibility

• Vehicle: BMW 125i F20 and F21 hatchback
• Years: 2016 onward
• Body styles: 3 door and 5 door
• Rear trim: suits cars with the M135i rear diffuser
• Layout: non-valve rear section
• Tailpipes: twin 90 mm mirror polished outlets

Fitting and support

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

Search terms to help you find this product

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