Milltek Sport Rear Exhaust/Axle-Back Back Box with GT-115 115mm Blue-Burnt Titanium Quad Tips/Tailpipes for BMW M3 G80 & M3 Competition 2020+ (OPF/GPF) ECE Approved | Rear Silencer/Muffler Upgrade | SSXBM1172

Rear Exhaust Upgrade with 115 mm Burnt Titanium GT-115 Tips for BMW G80 M3 and M3 Competition — Part No. SSXBM1172

Give your G80-platform M3 the sound and presence it deserves with this premium rear section from Milltek. Engineered for cars equipped with OPF/GPF, this bolt-on back box transforms the tone and finishes the rear end with stunning GT-115 blue-burnt titanium tailpipes. It is ECE certified for road use, delivers a deeper, richer soundtrack without unwanted cabin boom, and looks every bit as good as it sounds.

Key reasons enthusiasts choose this rear section

• Designed specifically for the BMW M3 G80 chassis, including M3 Competition, 2020 onward with OPF or GPF.
• ECE certified for street use across Europe, giving peace of mind for daily driving.
• Quad GT-115 115 mm burnt titanium tips for a motorsport-inspired, premium finish.
• High-grade 304 austenitic stainless construction for long-term durability and corrosion resistance.
• Mandrel-formed bends for smooth gas flow and a refined performance tone.
• Optimised tube diameters help unlock a more engaging exhaust note while maintaining drivability.
• Made in Britain with precision welding and excellent fitment to factory mounting points.
• Carefully tuned sound profile that enhances character without interior boom or harshness.

Built to perform and to endure

Milltek’s quality is evident in the materials, the finish and the sound tuning. Using robust 304 stainless throughout, this rear box is designed to resist corrosion and hold its appearance. The result is a rear exhaust section that elevates every drive, from cold start to high-load acceleration.

Feedback from our workshop

We have installed and supplied this system to multiple G80 M3 owners and it consistently impresses. Customers comment on the tasteful volume increase, the clean tone at motorway speeds and the head-turning look of the GT-115 tips. It is a superb upgrade for drivers who want quality, road-legal sound and standout styling.

Professional installation

Prefer expert fitting for a perfect finish and alignment of those 115 mm tips? Book installation with MJ Modifications in Warwickshire. Request a fitting quote via info@mjmodifications.co.uk.

Compatibility and part number

• Vehicle: BMW M3 G80, including M3 Competition
• Model years: 2020 onward
• Filter compatibility: OPF/GPF equipped cars
• Approval: ECE certified
• Part number: SSXBM1172

Order with confidence

Upgrade the soundtrack and rear styling of your BMW M3 with a UK-engineered rear section that looks incredible and sounds purposeful. The GT-115 burnt titanium finish completes the rear diffuser perfectly, while Milltek’s precision manufacturing ensures a high-quality, road-legal result.

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