Milltek Turbo-back with Secondary Hi-Flow Sports Cats for BMW 135i E82 E88 N55 2010 onwards
Transform your BMW 135i with a genuine Milltek turbo-back exhaust system featuring secondary hi-flow sports cats. Perfect for the BMW 1 Series 135i Coupe E82 and Cabriolet E88 with the N55 engine from 2010 onwards, this Milltek performance exhaust delivers the sound, flow and quality every 135i owner wants. If you are searching for a BMW 135i turbo-back exhaust, BMW 135i sports cat exhaust, E82 135i exhaust upgrade or E88 135i convertible exhaust system, this is the premium UK-made solution.
Why choose Milltek for your BMW 135i exhaust upgrade
- UK engineered and hand-finished for BMW 135i E82 and E88 N55 models from 2010 onwards.
- Constructed 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 reduced back pressure.
- Carefully enlarged bore over stock to unlock performance potential without sacrificing mid-range torque.
- Sports cats use high-flow catalytic substrates to maintain flow while helping manage emissions compared with straight decat options.
- Comprehensively tuned acoustics for a deep, sporty and crisp exhaust note without unwanted drone, NVH or cabin resonance.
- Designed to integrate cleanly with OEM mounting points and associated hardware for a precise fit.
What you get from this turbo-back with secondary hi-flow sports cats
- BMW 135i turbo-back performance exhaust system engineered specifically for the N55 engine.
- Secondary hi-flow sports catalytic converters for improved exhaust flow and turbo response.
- A balanced sound profile that enhances everyday driving and comes alive under load.
- A robust, long-lasting T304 stainless steel system that looks as good as it performs.
Fitment and compatibility
Suitable for:
• BMW 135i Coupe E82 N55 2010 onwards
• BMW 135i Cabriolet E88 N55 2010 onwards
Real-world results you can feel
We have fitted and used Milltek systems on our own builds and for customer cars, and feedback is consistently positive. Owners report sharper throttle response, smoother turbo spool and a refined but purposeful exhaust note that suits the 135i. If you are looking for the ultimate BMW 135i exhaust upgrade, this Milltek turbo-back with secondary hi-flow sports cats is the enthusiast’s choice.
Professional fitting available
We recommend professional installation. Nforcd offers fitting at our Warwickshire workshop. Request a quote at Sales@nforcd.com.
Key search terms
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Note: Emissions compliance and MOT requirements can vary by region and vehicle condition. Please check local regulations.