Milltek Sport OPF/GPF-Back Performance Exhaust with GT-115 Polished Trims for BMW M135i xDrive F40 (5-Door, 2019+) Particulate Filter-Back T304 Stainless Steel

Milltek Sport filter-back system for BMW M135i xDrive F40 - GT-115 mirror-polished tips

Transform the soundtrack and rear-end styling of your 2019-on BMW M135i xDrive F40 with this Milltek Sport petrol particulate filter-back assembly. Built in Britain from premium austenitic T304 stainless, it delivers a richer, more purposeful tone and freer breathing while keeping your factory petrol particulate filter in place. The GT-115 polished tailpipe finishers give a clean, motorsport-inspired look that suits the F40 hatch perfectly.

What you will notice

• Deeper, more characterful exhaust note with no annoying cabin boom
• Smooth, constant-radius bends for improved flow and response
• High-lustre GT-115 outlets for an OEM-plus appearance
• Non-magnetic T304 stainless construction for long-term corrosion resistance
• Developed and hand-finished in the UK by Milltek Sport
• Retains the original particulate filter for everyday usability

Why enthusiasts pick this setup

Milltek’s acoustic R&D gives the M135i a tasteful growl under load and a refined cruise with minimal NVH. The precision-formed pipework features carefully increased diameters over stock for efficient gas evacuation without sacrificing drivability. It is an ideal upgrade for drivers who want more presence, a premium look and materials that stand up to British roads.

Compatibility

BMW M135i xDrive F40 5-door, 2019 onward, vehicles equipped with a petrol particulate filter.

Our experience

We run Milltek hardware on our own builds and customer cars. Feedback is consistently positive on fit, finish and tone. If you want your F40 M135i to sound mature on the commute and come alive on a B-road, this is a proven choice.

Professional fitting

Prefer expert installation and alignment We offer fitting at MJ Modifications in Warwickshire. Request a quote: info@mjmodifications.co.uk.

Materials and build

• Austenitic T304 stainless steel - durable and corrosion resistant
• Mandrel-formed pipework for consistent internal diameter
• Precision-fabricated sections for excellent fitment
• Mirror-polished GT-115 tailpipes for a premium finish

Search-friendly terms customers use

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