Milltek Cat-Back/Catback Exhaust System for BMW M140i (F20/F21 LCI, 3 & 5 Door, 2015+) – Race Non-Resonated (Non-Res), Straight-Through T304 Stainless Steel – Burnt Blue Titanium-Look GT90 Tips – Performance Loud Rear Section UK Made B58 Upgrade

Unlock the soundtrack your BMW M140i deserves

Transform your BMW M140i F20 or F21 LCI with a UK-built performance rear system that delivers serious volume, razor-sharp response and stunning tailpipe styling. This straight-through, non-resonated setup replaces the factory rear section for a raw, motorsport-inspired note while keeping refinement where it matters. Finished with a pair of burnt blue GT90 titanium-finish tips, it looks as good as it sounds and fills the bumper perfectly.

Why enthusiasts choose this upgrade

• Made in Britain - Hand crafted by Milltek’s expert team for exacting quality and consistency.
• Premium T304 stainless construction - Highly resistant to corrosion, built to last through UK weather and road salt.
• Straight-through, non-res design - No centre silencer for maximum presence, sharper upshifts and a more aggressive overrun.
• Optimised flow path - Larger than OE pipework with smooth, full-radius bends to reduce back pressure and enhance throttle response.
• Burnt titanium GT90 tailpipes - 90 mm tips with a heat-treated blue finish for a premium motorsport look.
• Sound engineered - Sporty, crisp tone with minimal intrusive cabin boom for daily driving.
• Direct platform fitment - Designed specifically for BMW M140i F20 and F21 LCI 3-door and 5-door models from 2015 onwards.

Real-world results

We have supplied and installed this system on multiple customer M140i builds and the feedback is consistently positive: deeper idle, harder-hitting acceleration and a more engaging drive without the dull factory hush. It pairs brilliantly with the B58’s turbocharged character and supports future tuning plans.

Fitting and support

Want it fitted properly the first time? Book professional installation with MJ Modifications in Warwickshire. Email info@mjmodifications.co.uk for a tailored quote and lead times.

Compatibility

BMW M140i, F20 and F21 LCI, 3 door and 5 door, 2015 onwards. Suits cars running the standard downpipe or upgraded hardware.

What you get

• Performance rear section with enlarged diameter pipework
• Burnt titanium-finish GT90 twin tailpipes
• All required clamps and hardware for installation

Why buy from us

MJ Modifications are BMW performance specialists with hands-on experience of the M140i platform. We offer friendly advice, proven products and in-house fitting for a seamless upgrade.

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