Milltek Sport Cat-Back Exhaust Road, Titanium Tips for BMW 1 Series M135i (F20/F21) 3 & 5 Door 2012+

Performance stainless catback with titanium tailpipes for BMW 1 Series M135i F20 F21

Give your hot hatch the soundtrack and flow it deserves. This UK-engineered rear section transforms the F20 and F21 M135i with a sharper, richer tone and freer breathing, while keeping motorway manners civilised. Crafted from premium T304 austenitic stainless steel and finished with lightweight titanium tailpipes, it is a durable, bolt-on upgrade that looks as good as it sounds.

Built by specialists in Britain, the system uses smooth, constant-radius bends and optimised tubing diameter to increase gas velocity and response compared to the factory setup. The result is a crisp, sporty note on throttle without the annoying drone or boom that can spoil daily driving. The titanium exits add a purposeful motorsport style that suits the 1 Series perfectly.

• UK-made T304 stainless construction for long-term durability and corrosion resistance
• Precision-formed bends for uninterrupted exhaust flow and improved throttle response
• Larger diameter pipework than OEM for enhanced performance potential while retaining drivability
• Refined Road sound profile that is engaging under load yet calm at cruising speeds
• Striking titanium tailpipes for a lightweight, high-end finish
• Direct-fit catback replacement from the catalyst back using factory-style mounting points
• Supplied with appropriate fittings and hardware for a straightforward install
• Hand-finished quality with excellent alignment and fit on the F20 and F21 chassis

Compatibility

BMW 1 Series M135i F20 5-door and F21 3-door, 2012 onwards.

Why buy from us

We have fitted this setup on our own cars and many customer vehicles, and the feedback is consistently positive. Owners love the clean, drone-free tone, the premium build and the perfect fitment. If you want a performance exhaust for your M135i that delivers sound, quality and longevity, this is a proven choice.

Fitting service

Professional installation recommended. MJ Modifications offers fitting in Warwickshire. To request a quote or book your BMW M135i install, email info@mjmodifications.co.uk.

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