Milltek Turbo-Back Exhaust with Secondary Hi-Flow Sports Cats for BMW 1 Series 135i (E82 Coupe & E88 Cabriolet) N55 2010-on | T304 Stainless Performance System | UK-Made

Milltek Sport complete exhaust upgrade for BMW 135i E82 and E88 N55

Give your 1 Series the soundtrack and flow it deserves with a British-built stainless steel system that runs from the turbocharger to the tailpipes. This premium Milltek Sport exhaust uses secondary high-flow sports catalysts to boost gas velocity and throttle response while keeping refinement for daily driving. Ideal for enthusiasts chasing a quality stainless solution for the BMW 135i Coupe and Convertible with the N55 engine from 2010 onwards.

Why this system stands out

• Designed in the UK specifically for BMW 135i E82 and E88 models with the N55 powerplant.
• 304-grade stainless construction for long-term durability and excellent corrosion resistance.
• Mandrel-bent tubing maintains consistent diameter through the bends for optimal flow and reduced back pressure.
• Refined sports catalysts in the secondary positions for improved breathing compared to stock components.
• Precision welds and quality fittings for a factory-like installation and a secure, rattle-free finish.
• Balanced, sporty tone with a deeper note under load and minimal cabin boom at cruising speeds.

What you can expect

• Sharper response and smoother turbo spool for a more eager-feeling 135i.
• Turbo-to-tailpipe performance pipework that complements further tuning and intake upgrades.
• A clean, purposeful exhaust note that enhances the driving experience without being intrusive.
• A robust, high-quality stainless setup that looks as good as it performs.

Compatibility

Suitable for:
• BMW 135i E82 Coupe with N55 engine, 2010 onwards
• BMW 135i E88 Cabriolet with N55 engine, 2010 onwards

Proven on our builds

We have installed this Milltek system on our own cars and for customers, and the feedback is consistently positive. Drivers love the crisper throttle, improved drivability and the mature, motorsport-inspired tone.

Professional installation

We recommend fitting at MJ Modifications, Warwickshire. Request a fitting quote: info@mjmodifications.co.uk.

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Note: Emissions and MOT rules vary depending on vehicle condition and local regulations. Please check what applies to your car before purchase.