Milltek OPF/GPF Back Exhaust System with GT-115 Burnt Titanium Trims for BMW 128ti F40 5 Door 2021 onwards — Part No. SSXBM1205
Upgrade your BMW 128ti F40 with the Milltek OPF/GPF Back System and transform both the sound and style of your 1 Series hot hatch. This performance exhaust is designed, developed and hand-finished in the UK using aerospace grade Type 304 non-magnetic stainless steel. Expect a sharper, sportier exhaust note without harsh drone, superb build quality and stunning GT-115 burnt titanium trims that complete the rear end with a premium motorsport look.
Milltek’s precision mandrel-bent pipework ensures constant-radius bends for optimised gas flow. Carefully enlarged bores over stock promote responsiveness and performance while retaining excellent mid-range torque. Every system undergoes comprehensive acoustic tuning so you get a crisp, engaging tone that is refined on the motorway and exciting on full throttle.
Key details
- Brand: Milltek Sport
- Product: OPF/GPF Back Exhaust System with GT-115 Burnt Titanium Trims
- Part number: SSXBM1205
- Fitment: BMW 128ti 5 Door F40 with OPF/GPF, 2021 onwards
- Material: Type 304 aerospace grade stainless steel
- Construction: Mandrel bent pipework with enlarged bore for improved gas flow
- Sound: Sporty and crisp, engineered to minimise drone and cabin resonance
- Tailpipes: GT-115 burnt titanium trims for a distinctive performance finish
- Manufactured in the UK
Why choose this Milltek BMW 128ti exhaust
- Performance-focused gas flow: Mandrel bending and optimised bore diameters help the 128ti breathe better for a more responsive drive.
- Refined daily usability: Acoustic development targets a clean, sporty soundtrack without unwanted NVH or boom.
- Premium materials: Type 304 stainless steel resists corrosion and discolouration and is used throughout the system, including silencers and hardware.
- Stunning finish: GT-115 burnt titanium tips elevate the rear aesthetics with a true motorsport look.
- UK engineered and hand-finished: Built by experienced craftsmen for long-term durability and consistent quality.
Compatibility and search terms
This exhaust is specifically for OPF/GPF equipped BMW 128ti F40 5 Door models, 2021 onwards. Common search terms include: BMW 128ti exhaust, BMW 1 Series F40 exhaust, 128ti performance exhaust, Milltek OPF back exhaust, Milltek GPF back exhaust, BMW 128ti cat-back upgrade, Milltek SSXBM1205, GT-115 burnt titanium tips, BMW 128ti titanium tips exhaust, 128ti exhaust system UK, BMW 128ti Milltek Sport.
Trusted by Nforcd customers
We use Milltek on our own builds and our customers consistently rate this BMW 128ti exhaust for its quality, fit and balanced sound. It delivers the excitement you want without compromising day-to-day refinement.
Fitting and support
Professional fitting available at Nforcd in Warwickshire. For an installation quote or product advice, contact Sales@nforcd.com.
What you are upgrading
This OPF/GPF back system replaces the sections after the factory particulate filter on OPF/GPF-equipped vehicles. It is a popular upgrade often searched as a cat-back exhaust for BMW 128ti F40, delivering enhanced tone, reduced weight versus many OE systems and a more engaging driving experience.
Part number: SSXBM1205 — the definitive Milltek OPF/GPF Back System with GT-115 burnt titanium trims for the BMW 128ti F40.