BMW M4 G82 2021+ Side Skirts Diffusers / Sill Extensions - Maxton Design V1 Gloss Piano Black ABS Side Blades Rocker Splitters / Side Lips (Pair with Fitting Kit) Coupe/Competition

Maxton Design V1 Piano Black Sill Extensions for BMW G82 M4 2021 onwards

Transform the profile of your G82 M4 with these Maxton Design V1 piano black sill extensions. Precision contoured for the 2021 on BMW M4 coupe, these lower rocker trims add a crisp, motorsport inspired edge and an OEM plus finish that ties in perfectly with black exterior details and shadowline trim.

Vehicle compatibility

BMW M4 G82 2021 onwards

Why enthusiasts choose this setup

• Model specific geometry for the G82 M4 for clean, repeatable fit
• Deep high gloss black surface that looks factory fresh and complements front lip and rear undertray styling
• Aggressive side profile that visually lowers the car and sharpens stance
• Automotive grade ABS for daily driven durability and impact resistance
• Lightweight, bolt on styling that elevates the look without unnecessary complexity
• Supplied with fixings and an instruction sheet for a straightforward install

What is included

• Left and right sill blades
• Fitting hardware
• Installation guide

Finish and material

Manufactured from tough ABS plastic with a deep piano black finish. The surface quality is designed for everyday use while delivering a premium gloss that pairs seamlessly with other Maxton Design exterior pieces on the G82 platform.

Installation and fitting support

Professional fitting is recommended for best alignment. MJ Modifications offers fitting at our Warwickshire workshop. To request a quote, please email info@mjmodifications.co.uk.

View the official Maxton Design installation guide

Tried and loved by our customers

We have installed these in house and the feedback has been consistently excellent. Owners comment on the tight fit, the rich gloss finish and the way these lower trims complete the side view of the M4.

Protective film

Each piece arrives vacuum wrapped in a thin protective film to guard the surface in transit. Remove the film after installation to reveal the flawless gloss beneath. Any light marks you see on the film are not on the product.

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