Milltek Sport Cat-Back Exhaust OPF/GPF Bypass, Quad GT-100 100mm Black Tips for BMW 3 Series G20 M340i xDrive Saloon 2019-2021 (OPF/GPF Models) - Requires OE Cut - SSXBM1163

Milltek Sport rear system with particulate filter bypass and quad 100 mm black tailpipes for BMW G20 3 Series M340i xDrive saloon 2019 to 2021 — Part No. SSXBM1163

Unlock the soundtrack your B58 deserves with this UK-built Milltek Sport rear exhaust for the G20 M340i xDrive. Designed to replace the factory pipework from the catalyst backward and to route around the OPF/GPF, it frees up flow and delivers a richer, deeper tone without turning every journey into a chore. If you are hunting for a performance exhaust for the G20 340i, an OPF delete solution for the M340i, a quad exit black tip upgrade, or a premium stainless steel system for your AWD 3 Series, SSXBM1163 is the enthusiast favourite.

Key reasons drivers choose SSXBM1163

• Made in the UK from aerospace-grade T304 stainless steel for long-term durability and corrosion resistance.
• CNC mandrel-bent tubing maintains consistent diameter for efficient gas velocity and responsive performance.
• Developed for a refined, sporty soundtrack with minimal cabin boom and no intrusive drone at motorway speeds.
• OPF and GPF bypass configuration tailored to particulate filter-equipped G20 models for a more engaging note.
• Quad GT-100 100 mm black tailpipe finishers that suit the M340i rear bumper and elevate the OEM look.
• Precision fitment from one of the UK’s most respected performance exhaust specialists.

Compatibility and specification

• Vehicle: BMW G20 3 Series M340i xDrive saloon with OPF/GPF.
• Model years: 2019, 2020 and 2021.
• Layout: cat back style rear system with particulate filter bypass and quad 100 mm black tips.
• Installation note: cutting of the original exhaust is required during fitting.
• Milltek part number: SSXBM1163.

Sound, quality and everyday usability

Milltek’s acoustic tuning complements the turbocharged straight six, adding crisp character under load while remaining civil in Comfort mode. The straight-through silencer design, constant-radius bends and enlarged pipework work together to reduce back pressure and enhance throttle response, all while retaining daily drivability. The all-T304 construction resists discolouration and cracking, ensuring the system looks and performs great for years.

Trusted by our team and our customers

We have supplied and installed this system on multiple M340i xDrive cars and feedback has been consistently positive. Owners love the perfect tip alignment, premium finish and the deeper, more purposeful soundtrack that suits the character of the B58 without unwanted harshness.

Professional fitting available

Want it installed correctly first time? Book fitting with MJ Modifications in Warwickshire. Email info@mjmodifications.co.uk for a tailored quote.

What buyers search for

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Important: This particulate filter bypass rear system requires cutting the factory exhaust during installation. Check and comply with local laws regarding emissions equipment and road use before purchase and fitment.