Milltek BMW B58 F20 F21 M140i Cat-Back Exhaust System
Unlock the sound and performance your BMW 1 Series M140i deserves with the Milltek Sport cat-back exhaust. Perfect for the B58-powered F20 and F21 3-door and 5-door models, this high quality stainless steel system delivers a deeper, sportier tone, sharper throttle response and genuine weight savings over the factory exhaust. If you are searching for BMW M140i exhaust, M140i cat back, B58 cat back exhaust, Milltek M140i exhaust or BMW 1 Series F20 F21 performance exhaust, you have found the proven upgrade enthusiasts choose.
We run Milltek systems on our own cars and our Nforcd customers consistently praise the build quality, fit and the addictive exhaust note. Designed and manufactured in the UK, Milltek’s attention to detail and decades of motorsport and road development shine through in every component.
Why choose this Milltek cat-back for your M140i
- Transforms performance and drivability with improved throttle response
- Substantial weight saving over the OE exhaust system
- Low back-pressure design for maximum performance with no loss of low-end torque
- Precision, quality-controlled manufacture to ISO 9001 standards
- Crafted from aircraft-grade type 304 stainless steel that is anti-magnetic and highly resistant to discolouration
- Mandrel-bent pipework to maintain consistent 3.00 inch (76.20 mm) bore for optimal gas flow
- Twin 90 mm GT90 tailpipe style for a purposeful, factory-plus finish
- Responsibly developed and engineered in the UK
Sound options and valves
Choose the exhaust tone that suits your build. Resonated variants are non-valved for a refined, daily-friendly soundtrack. Race non-resonated systems are valved, giving you a louder, more aggressive note when you want it.
Fitment and compatibility
Compatible with BMW 1 Series M140i 3-door and 5-door models (F21 and F20) with the B58 engine. This is the ideal BMW M140i cat back exhaust upgrade for enthusiasts seeking a Milltek Sport exhaust for daily driving, spirited road use or performance builds.
Technical highlights
- Pipe diameter: 3.00 inch (76.20 mm)
- Tailpipes: Twin 90 mm GT90
- Material: Type 304 stainless steel throughout, including silencers
Part numbers
- SSXBM1040
- SSXBM1041
- SSXBM1042
- SSXBM1043
- SSXBM1044
- SSXBM1045
- SSXBM1046
- SSXBM1047
- SSXBM1048
- SSXBM1049
Manufactured by
Milltek Sport
Warranty
Milltek two year warranty
Professional fitting at Nforcd
For expert installation, book your fitting with Nforcd in Warwickshire. Request a quote via Sales@nforcd.com and our team will be happy to help.
Popular search terms
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