3DDesign
3DDesign Carbon Fibre (Carbon Fiber) Side Skirts & Extensions / Rocker Blades for BMW 4 Series G22 G23 (2020+) Coupe & Convertible M Sport M440i | CFRP 2x2 Twill Aero Sill Extensions Body Kit
3DDesign Carbon Fibre (Carbon Fiber) Side Skirts & Extensions / Rocker Blades for BMW 4 Series G22 G23 (2020+) Coupe & Convertible M Sport M440i | CFRP 2x2 Twill Aero Sill Extensions Body Kit
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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Transform the profile of your G22 or G23 with premium CFRP side extensions from 3DDesign. Crafted for the coupe and convertible platforms including M440i, these sculpted rocker blades add serious road presence while complementing factory body lines for a clean OEM-plus look. We run these on our own cars and customer feedback has been outstanding for fit, finish and the way they sharpen the stance.
Why enthusiasts choose this upgrade
- Precision engineered for the G22 and G23 chassis for tight, repeatable alignment on M Sport sills
- Lightweight CFRP construction with a 2x2 twill weave for strength and a high-end motorsport aesthetic
- Aggressive side profile that visually lowers the car and ties in perfectly with splitters and diffusers
- Direct fit with model-specific mounting kit included for a straightforward install
- Trusted brand with consistent quality and fitment that our customers love
What you receive
- 1 x left-hand CFRP side extension, 2x2 twill
- 1 x right-hand CFRP side extension, 2x2 twill
- Vehicle-specific installation hardware
Vehicle compatibility
- BMW 4 Series G22 G23, 2020 onwards
- BMW M440i G22 G23, 2020 onwards
Note: Designed for M Sport models only.
Fitting and support
Professional installation recommended. Book fitting with MJ Modifications in Warwickshire. Request a quote at info@mjmodifications.co.uk.
Search-friendly terms
BMW G22 side skirt extensions, G23 rocker panel extensions, coupe side blades, cabriolet sill extensions, M440i aero skirts, CFRP 2x2 twill side extensions, BMW 4 Series rocker garnish, side skirt kit G22, carbon weave side blades for BMW, performance body kit side pieces, OEM-plus side extensions, ground effects skirts for BMW G22 G23.
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