Milltek Sport OPF/GPF Back (Axle-Back) Exhaust for BMW 1 Series 128ti F40 2021+ - Rear Silencer/Back Box/Muffler | Stainless Steel | GT-115 Polished Twin Exit Tips | SSXBM1202

Transform the soundtrack and tail-end look of your F40 128ti

Give your hot hatch the voice and finish it deserves with this UK-crafted rear section from Milltek Sport. Engineered to fit after the particulate filter on 2021 onward five-door 128ti models, this precision-made system delivers a richer, more engaging tone and a premium OEM plus appearance thanks to the GT-115 polished tailpipes. Part Number: SSXBM1202.

Why enthusiasts choose it

• British made from type 304 non-magnetic stainless steel for outstanding longevity and corrosion resistance.
• Mandrel-bent tubing for smooth gas flow and a sharper response feel without compromising daily drivability.
• Acoustic development focused on a sporty, refined soundtrack with minimal cabin boom or drone.
• GT-115 mirror-finish trims for a clean, factory-style upgrade that complements the F40 rear valance.
• Direct bolt-on rear section that retains the factory particulate filter and uses OEM mounting points.
• Designed specifically for the 1 Series F40 128ti five-door from 2021 onwards with OPF/GPF.

Fitment

Compatible with: BMW 1 Series F40 128ti, five-door, 2021 onward, petrol particulate filter equipped models.

Milltek Sport Part Number: SSXBM1202

What you will love in the real world

We have fitted this system for customers and the feedback is consistently positive. Owners praise the deeper tone at low revs, a cleaner rasp on throttle, and the high-quality finish of the polished GT-115 tips. If you want a subtle yet purposeful upgrade that looks factory fresh and sounds properly sporty, this is a proven choice.

Ideal searches and related terms

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Professional installation

Want it fitted by specialists who know these cars inside out? Book installation with MJ Modifications in Warwickshire. Request a fitting quote at info@mjmodifications.co.uk.