Milltek OPF/GPF Back Exhaust with JET-115 Carbon Trims for BMW M135i xDrive F40 5 Door 2019 onwards
Unlock the soundtrack your BMW M135i xDrive F40 deserves with the Milltek particulate filter-back exhaust system. Designed for OPF/GPF equipped cars, this OPF-back exhaust replaces the system after the factory GPF to enhance tone and character while retaining the original particulate filter. It is the perfect performance exhaust upgrade for the 2019 onwards BMW M135i xDrive 5 Door F40.
Hand-finished in the UK, every Milltek system is crafted from aerospace-grade type 304 non-magnetic stainless steel for superior corrosion resistance and longevity. Precision mandrel bends maintain a constant radius for optimised gas flow, while carefully selected bore sizes maximise performance potential without sacrificing mid-range drivability. The result is a crisp, sporty exhaust note developed to avoid NVH, drone or unwanted cabin resonance.
Why choose this Milltek OPF-back exhaust for your BMW M135i xDrive F40
- Designed for OPF/GPF equipped BMW M135i xDrive F40 5 Door 2019 onwards
- OPF-back exhaust system also known as GPF-back or particulate filter-back
- Premium JET-115 carbon fibre tailpipe trims for a high-end motorsport look
- Aerospace-grade type 304 stainless steel throughout the pipework and silencers
- Mandrel-bent tubing for consistent, smooth gas flow
- Engineered soundtrack that is sporty and refined with no drone
- Retains factory OPF/GPF for emissions equipment compatibility
- Built in the UK by time-served craftsmen with meticulous attention to detail
Sound, quality and everyday usability
Milltek’s comprehensive acoustic development delivers a deeper, more engaging tone that complements the M135i’s character without becoming intrusive on the motorway. The refined sound profile and precision construction make this an ideal daily-driven performance exhaust upgrade.
JET-115 carbon fibre tips
The JET-115 carbon trims provide a premium, stealthy finish that elevates the rear of the F40 M135i. The carbon fibre outer with Milltek’s signature design gives a factory-plus appearance that pairs perfectly with the car’s aggressive styling.
Trusted by enthusiasts
We run Milltek systems on our own cars and have supplied and fitted them for many happy Nforcd customers. The fit, finish and sound quality consistently impress, making this a go-to choice for a BMW M135i exhaust upgrade.
Compatibility
BMW M135i xDrive 5 Door F40 2019 onwards - OPF/GPF equipped vehicles.
Fitting and support
Professional fitting available at Nforcd in Warwickshire. For a tailored installation quote or advice, email Sales@nforcd.com.
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