Milltek Stainless Steel Particulate Filter-Back Performance Exhaust, Fits OE Trims, BMW G20 M340i xDrive Saloon 20192021 (OPF/GPF Models Only), Requires OE System Cut SSXBM1157

Milltek Filter-Back System for BMW G20 M340i xDrive Saloon 2019 to 2021 - Part No. SSXBM1157

Give your G20 M340i xDrive the soundtrack it deserves with Milltek SSXBM1157. This stainless steel rear section replaces the pipework after the gasoline particulate filter, so the factory OPF/GPF stays in place while you enjoy a richer, deeper tone and a more engaging drive without intrusive cabin resonance. Designed to pair with the original bumper outlets, you keep the clean factory appearance with a far more purposeful note.

Why this Milltek rear section is the sweet spot

• Crafted in the UK from premium 304-grade stainless for long-term durability and corrosion resistance.
• Mandrel-bent tubing for smooth gas flow and response across the rev range.
• Optimised diameter over stock for improved breathing while preserving low to mid-range torque.
• Refined acoustic tuning for a sporty, characterful sound without boom or harshness on the motorway.
• Integrates with the original tailpipe finishers for a discreet OEM-style look.
• Keeps the particulate filter intact, ideal for daily driven cars and OPF/GPF equipped models.

Compatibility and key details

• Vehicle: BMW 3 Series G20 M340i xDrive Saloon.
• Model years: 2019, 2020, 2021.
• For petrol particulate filter cars only, OPF and GPF compatible.
• Part number: SSXBM1157.
• Installs to the original tailpipe apertures and requires the factory system to be cut during fitting.

Tried, fitted and loved by enthusiasts

We have run Milltek systems on our own vehicles and fitted this specific filter-back to many customer cars. Feedback is consistent every time: top-tier build quality, precise fitment with the stock finishers, and a more assertive note that stays civil on longer journeys. If you want a quality stainless rear section for your M340i that looks factory but sounds special, SSXBM1157 delivers.

Professional fitting

This product involves cutting the original system for installation. For expert fitting, aftercare and advice, book with MJ Modifications in Warwickshire. Email info@mjmodifications.co.uk to request a quote and availability.

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Notes

• For OPF and GPF equipped models only.
• Cutting of the original system is required during installation.
• Retains the original tailpipe finishers for an OEM style appearance.