Performance M
Maxton Design Racing Durability Rear Diffuser V4 / Rear Splitter BMW M140i (F20 F21) 20162019 10mm ABS Matte Black
Maxton Design Racing Durability Rear Diffuser V4 / Rear Splitter BMW M140i (F20 F21) 20162019 10mm ABS Matte Black
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Racing-Grade Rear Lower Diffuser V4 - BMW M140i F20 F21 2016-2019 - 10mm ABS Matte Black
Give your hot hatch a serious back-end upgrade with this V4 rear lower diffuser for the BMW M140i. Built in 10mm Racing Durability ABS, it adds a muscular, motorsport-inspired finish while standing up to daily driving. If you are hunting for a rear valance insert, lower bumper undertray, rear under spoiler, aero diffuser fins or a back bumper extension for the 1 Series M140i F20 F21, this is the go-to choice for looks and longevity.
What makes it stand out
- Racing Durability construction - solid 10mm ABS for exceptional rigidity and impact resistance.
- Scratch resistant and UV protected - helps maintain colour and finish over time.
- Weather and temperature resistant - dependable all year round in UK conditions.
- Bold V4 styling - sharper, wider stance with defined aero fins for an aggressive OEM+ look.
- Supplied ready to install - no painting required and delivered with a protective film.
- Authentic Maxton Design item - labelled for traceability and quality assurance.
- Material certified - TUV MATERIALGUTACHTEN for peace of mind.
Finish options
- 10mm matte black
- 10mm matte black with red core
In the box
- Maxton Design V4 rear diffuser - Racing Durability series
- Mounting kit
Compatibility
- BMW M140i - F20 F21 - 2016, 2017, 2018, 2019
- Part number: BM-1-F20F-M-RS1
Why enthusiasts choose this upgrade
We have fitted this diffuser in-house at MJ Modifications and customer feedback has been outstanding. Owners love the precise fitment, the tough 10mm ABS build and the way it transforms the rear profile without looking out of place. If you want a performance styling upgrade that complements the M140i’s lines, this V4 diffuser delivers.
Professional fitting
Professional installation is recommended. Book fitting with MJ Modifications in Warwickshire - request a quote: info@mjmodifications.co.uk.
Search-friendly terms
BMW 1 Series M140i F20 F21 rear valance insert - rear bumper extension - rear undertray - rear under spoiler - diffuser fins - aero kit - body styling - M140i B58 rear upgrade - hatchback rear splitter alternative - LCI 1 Series rear styling 2016 2017 2018 2019 - matte black diffuser panel - Maxton RD line 10mm ABS - premium rear aero for BMW M140i.
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