Milltek Rear Silencer Bypass Non Valved Louder with GT-90 Polished Trims for BMW 125i F20 F21 B48 2016 onwards
Transform the sound and character of your BMW 125i with this Milltek rear silencer bypass non valved exhaust upgrade. Designed for the BMW 125i 3 door and 5 door hatch F20 and F21 with the B48 engine, 2016 onwards, this Milltek Sport rear section replaces the factory rear silencer for a louder, more aggressive exhaust note without the drone. Supplied with GT-90 polished trims and designed to suit the M135i rear valance, this is the go-to back box delete for BMW 125i owners who want a deeper, sharper, motorsport-inspired tone and premium tailpipe styling.
Milltek exhaust systems are engineered and hand finished in the UK using aerospace grade type 304 non magnetic stainless steel. Mandrel bent pipework keeps a constant radius for optimised gas flow, and intelligently chosen bore sizes deliver performance without sacrificing mid range torque. Every Milltek system goes through extensive acoustic development to achieve a sporty, crisp soundtrack with excellent refinement and no cabin resonance.
Why choose this Milltek rear silencer bypass for your BMW 125i
- Fitment: BMW 125i F20 and F21 3 door and 5 door hatch, B48 engine only, 2016 onwards
- Configuration: Rear silencer bypass non valved for maximum sound and response
- Tailpipes: GT-90 polished trims for a clean OEM plus look
- Valance: Designed for vehicles with the M135i rear valance
- Material: T304 stainless steel throughout for durability and corrosion resistance
- Construction: Mandrel bent pipework for smooth exhaust flow
- Sound: Louder, deeper, more engaging tone with no unwanted drone
- Made in the UK by Milltek Sport
Real world results
We have installed and used this Milltek rear silencer bypass on customer cars and our own project vehicles. Feedback is consistently positive. Owners love the louder exhaust, the sharper throttle response feel, and the premium GT-90 polished tailpipe finish. If you are searching for a BMW 125i exhaust upgrade, rear box delete, back box delete, silencer delete, non valved rear section, or Milltek 125i F20 F21 B48 system, this is the solution that delivers sound, quality and style.
Key search terms and compatibility
Compatible with BMW 125i F20 F21 B48 2016 onwards. Ideal keywords and common searches include: Milltek rear silencer bypass, Milltek 125i exhaust, BMW 125i F20 exhaust, BMW 125i F21 exhaust, B48 exhaust upgrade, non valved rear section, louder exhaust, back box delete, rear box delete, silencer delete, GT90 polished trims, GT-90 tips, M135i valance exhaust, Milltek Sport UK exhaust, stainless steel exhaust for BMW 125i.
Fitting and support
Professional fitting recommended. We offer installation at Nforcd in Warwickshire. Request a fitting quote by emailing Sales@nforcd.com and our team will be happy to help.
Choose Milltek for a precision engineered, UK made BMW 125i exhaust upgrade. Choose Nforcd for expert advice, friendly service and professional fitting.