Performance M
Maxton Design V.1 Gloss Black Side Skirts, Side Splitters & Sill Extensions for BMW 4 Series G22 Coupe M Sport 2020+ (Rocker Panel Aero Blades, Side Skirt Diffusers, ABS) | Fits 420i 430i M440i xDrive
Maxton Design V.1 Gloss Black Side Skirts, Side Splitters & Sill Extensions for BMW 4 Series G22 Coupe M Sport 2020+ (Rocker Panel Aero Blades, Side Skirt Diffusers, ABS) | Fits 420i 430i M440i xDrive
Heads-up on cancellations & returns: if you cancel an order or return an item, you won't get back 100% of what you paid. We apply a 10% restocking fee, the outbound shipping is non-refundable, and we have to pass on Shopify / PayPal payment processing fees; these aren't returned to us when we refund you. International orders also lose on exchange-rate spread in both directions. If the original packaging is damaged or missing, a reboxing charge applies. For international orders specifically, if you refuse to pay our shipping invoice or supply a prepaid label after placing the order, the same deductions apply. We're upfront about this — please be sure of your purchase before ordering.
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V.1 Gloss Black Aero Side Blades for BMW 4 Series G22 Coupe with M Sport package 2020 onwards
Transform the silhouette of your G22 4 Series Coupe with these authentic Maxton Design V.1 gloss black rocker extensions. This pair of aero side splitters tightens the stance, visually lowers the car and ties in perfectly with M Sport lines for a clean, premium, performance-led look. If you want that OE-plus aesthetic with sharper edges and a purposeful profile, this is the bolt-on upgrade that delivers.
Made from ABS with a high-gloss finish, these sill extensions balance toughness and flexibility for daily driving while offering a crisp, deep black shine. Fit and finish are excellent, installation is straightforward with the supplied hardware, and the result is a subtle yet striking change that our team and customers rate highly on both quality and appearance.
Why choose these side splitters
- Designed for BMW 4 Series G22 Coupe with M Sport styling, model years 2020 onward
- Gloss black aero blades enhance the lower edge for a sportier, lower-looking profile
- Durable ABS construction for a robust, lightweight add-on
- Precision contours that align with factory sills for a neat, OE-like install
- Supplied with mounting kit and step-by-step fitting guide
What you receive
- Pair of side splitter panels
- Fitting hardware
- Installation manual
Download the fitting manual: Click here
Compatibility
Suits BMW 4 Series G22 Coupe with M Sport exterior pack, 2020 onward. Not intended for other 4 Series body styles or packages.
Installation and support
Professional fitting is recommended for the best alignment and finish. Book installation with MJ Modifications in Warwickshire. Request a fitting quote: info@mjmodifications.co.uk.
Useful info
ABS offers a balance of rigidity and resilience suitable for exterior aero components.
Items arrive with a protective film to guard the surface during transit. Remove the film to reveal the gloss finish. Any light marks on the film are not defects.
Search terms to help you find this item
BMW G22 side splitters, BMW 4 Series rocker panel extensions, BMW 4er Coupe sill extensions, G22 aero side blades, BMW M Sport side skirt add ons, gloss black rocker covers BMW 4 Series, BMW 420i 430i M440i side skirts, BMW G22 xDrive side splitters, BMW 4 Series 2020 2021 2022 2023 2024 side extensions, Maxton V1 side blades G22, BMW 4 Series Coupe body kit side pieces, BMW G22 M Performance style aero, gloss black sill diffusers BMW 4 Series.
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