Milltek OPF/GPF Back System with GT-115 Polished Trims for BMW M135i xDrive F40 5 Door 2019-on
Transform the sound and style of your BMW M135i xDrive F40 with the Milltek OPF/GPF Back System featuring GT-115 polished trims. This performance exhaust upgrade is designed, developed and hand-finished in the UK, delivering a deeper, sportier M135i exhaust note with a crisp tone and no unwanted cabin drone. If you are searching for a BMW M135i F40 exhaust, M135i xDrive exhaust upgrade, OPF back exhaust, GPF back exhaust or Milltek M135i performance exhaust with polished tips, this is the premium, UK-made solution.
Every Milltek system is produced from aerospace grade type 304 non-magnetic stainless steel for exceptional durability and corrosion resistance. Mandrel-bent pipework ensures constant radius bends for optimised gas flow, and carefully enlarged bore diameters over stock help enhance performance while preserving mid-range torque. Extensive acoustic development delivers a refined yet sporty soundtrack that enhances everyday driving without NVH, drone or cabin resonance.
Key features
- OPF/GPF back performance exhaust for BMW M135i xDrive F40 5 Door 2019-on OPF/GPF equipped models
- Premium GT-115 polished trims for a clean, high-end finish
- Aerospace grade type 304 stainless steel construction for long-lasting durability
- Mandrel-bent pipework for consistent, optimised gas flow
- Enlarged bore diameters compared to stock to support performance while retaining drivability
- Sporty, crisp exhaust tone engineered to avoid drone and cabin resonance
- Designed, developed and hand-finished in the UK by experienced craftsmen
Vehicle compatibility
BMW M135i xDrive 5 Door F40, 2019-on, OPF/GPF equipped vehicles only.
Why choose this Milltek M135i exhaust
If you are researching BMW M135i exhaust upgrades, Milltek M135i F40 GPF-back systems, OPF back exhausts or GT-115 polished tip exhausts, this Milltek delivers the ideal blend of quality, fit and sound. The stainless steel build and UK craftsmanship provide a premium finish, while the tuned acoustic profile gives your M135i xDrive a more engaging note on throttle and a refined drive at cruising speeds.
What our customers say
We have supplied and fitted this system for M135i owners and feedback has been consistently positive. Customers love the sharper, more characterful sound, the lack of drone on the motorway and the standout look of the GT-115 polished trims.
Fitting and support
Professional fitting is recommended. Nforcd in Warwickshire can install this Milltek OPF/GPF Back System for your BMW M135i xDrive F40. Request a fitting quote at Sales@nforcd.com.
Search terms to help you find the right exhaust
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