Performance M
Maxton Design V.3 Gloss Piano Black Side Skirts/Side Splitters/Side Skirt Diffusers Sill & Rocker Extensions for BMW 4 Series G22 Coupe M Sport (M Pack) 2020+ 420i 430i M440i – Side Blades Ground Effects
Maxton Design V.3 Gloss Piano Black Side Skirts/Side Splitters/Side Skirt Diffusers Sill & Rocker Extensions for BMW 4 Series G22 Coupe M Sport (M Pack) 2020+ 420i 430i M440i – Side Blades Ground Effects
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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Maxton V.3 Piano Black Sill Extensions for BMW G22 4 Series Coupe with M Sport package 2020 onwards
Transform the side profile of your BMW G22 4 Series Coupe with Maxton Design V.3 side extension blades in a deep gloss black finish. These lower body trims deliver that OEM plus look enthusiasts want, adding visual width, a lower stance and a sharper edge that ties in perfectly with M Sport styling. A simple yet high impact upgrade for daily drivers and show builds alike.
Why enthusiasts choose these Maxton side blades
- Precisely made for the BMW 4 Series G22 Coupe with M Sport package from 2020 onwards including 420i, 430i and M440i
- Piano black surface for a premium, factory style appearance that complements M accents and shadowline trim
- V.3 profile for a crisper line along the sills and a more planted, road hugging look
- ABS construction for strength and flexibility suitable for everyday UK road conditions
- Enhances the visual aero theme and pairs neatly with front lips and rear diffusers
- Supplied with fitting hardware and a step by step installation guide
What you receive
- Maxton Design V.3 side extension set for both sides
- Complete mounting kit
- Printed installation manual
Material and finish
Manufactured from ABS plastic chosen for impact resistance and flexibility. Delivered in a high gloss black finish with a protective transport film to safeguard the surface in transit.
Important: Remove the protective film after test fitting to reveal the flawless gloss surface.
Fitment
Compatible with BMW 4 Series G22 Coupe M Sport 2020 onwards. Engine variants covered include 420i, 430i and M440i.
Real world results
We have fitted these on customer G22 cars and feedback has been consistently positive. Owners love the precise fit, the rich gloss finish and the way the car looks lower and cleaner without compromising day to day usability.
Installation
Professional fitting recommended for the best alignment and finish. Book fitting with MJ Modifications in Warwickshire. Request a quote at info@mjmodifications.co.uk.
Fitting manual: View and download.
Search friendly terms
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