Milltek OPF/GPF Back Exhaust System with GT-115 Titanium Trims for BMW M135i xDrive F40 (2019 onwards)
Upgrade your BMW M135i xDrive F40 with the Milltek OPF/GPF Back System and GT-115 titanium trims. This performance exhaust delivers a deeper, sportier tone and sharper aesthetics without compromising comfort or daily usability. Designed, developed and hand-finished in the UK, it is the go-to exhaust upgrade for owners searching for a premium M135i F40 exhaust with real quality, durability and sound.
Every Milltek system is produced from aerospace grade type 304, non-magnetic stainless steel. This superior material resists discolouration and corrosion, and is used throughout the pipework, silencers and associated hardware for long-lasting performance and a factory-quality fit.
Mandrel-bent pipework maintains a constant radius for optimised gasflow, while carefully enlarged bore diameters over stock help deliver the performance you want without sacrificing mid-range torque. Each system goes through comprehensive acoustic development to create a sporty, crisp soundtrack with no unwanted NVH, drone or cabin resonance.
Why choose this Milltek M135i F40 exhaust
- OPF/GPF-back performance exhaust for BMW M135i xDrive 5-door F40 (2019 onwards, OPF/GPF equipped)
- GT-115 titanium trims for a premium, motorsport-inspired finish
- Aerospace grade type 304 stainless steel throughout
- Mandrel-bent tubing for smooth, consistent gasflow
- Carefully tuned sound: sporty and engaging without drone
- Designed, developed and hand-finished in the UK
What our customers say
We have installed and run this Milltek M135i F40 exhaust on customer cars and our own demonstrators. Feedback is consistently positive: better exhaust tone, great presence on throttle, refined on the motorway, and the GT-115 titanium trims transform the rear end look. It is a highly popular M135i exhaust upgrade for drivers who want quality and sound without compromise.
Fitment
BMW M135i xDrive 5 Door (F40) with OPF/GPF, 2019 onwards.
Popular search terms
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Professional fitting
We recommend professional installation at Nforcd in Warwickshire. Request a fitting quote: Sales@nforcd.com