Milltek Sport Road (Resonated) Cat-Back Exhaust with Ceramic Black Tips for BMW M135i (N55) F20/F21 3- & 5-Door 2012+ UK-Made Stainless Steel

British-built catback upgrade with black ceramic tailpipes for BMW 1 Series M135i F20 F21

Give your 1 Series hot hatch the sound and quality it deserves with this premium catback rear section from Milltek. This resonated, road-friendly system with stealthy black ceramic tailpipes transforms the M135i without drone, adds a deeper tone under load, and keeps refinement on the motorway. We run this setup on our own cars and for customer builds, and feedback on tone, fit and finish is consistently outstanding.

Highlights

• Crafted in the UK from T304 stainless steel for long-term corrosion resistance and durability
• Mandrel-bent pipework and optimised bore for smooth gas flow and sharper throttle response
• Resonated touring sound profile for daily usability with a purposeful growl when you want it
• Black ceramic-coated tailpipe finish for an OEM-plus, stealth look
• Direct bolt-on replacement using factory hangers and mounting points
• Retains the original catalyst location for emissions-friendly performance
• Perfect for standard cars and tuned N55 setups looking for a quality exhaust note

Compatibility

BMW M135i N55 1 Series hatchback, F20 5-door and F21 3-door, 2012 onwards. Designed to fit vehicles with standard mounting hardware and original rear section layout.

How it sounds and drives

Expect a richer, deeper exhaust note with improved turbo presence and clean overrun character. Cabin comfort is maintained, with no unwanted resonance at cruising speeds. The freer-flowing layout helps the engine breathe for more immediate response and a more engaging drive.

Build quality

Precision UK manufacture, TIG welds, and high-grade T304 stainless throughout deliver a robust system that resists rust and looks as good as it sounds. The ceramic-coated tips complete the look with a durable, low-key finish that suits the M135i’s styling.

Fitting service

Want it installed properly first time? Book professional fitting with MJ Modifications in Warwickshire. Request a quote at info@mjmodifications.co.uk.

Why buy from us

We have hands-on experience fitting and running this system on M135i builds. Customers love the refined soundtrack, perfect alignment, and premium finish. It is a proven upgrade that enhances driving enjoyment without compromising day-to-day comfort.

Search-friendly terms

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