TRE Dry Prepreg Carbon Fibre/Fiber Side Skirts/Skirt Extensions for BMW M3 G80 G81 & M4 G82 G83 (G8X) – Rocker Panel Extensions, Side Splitters, Sill Blades, Side Lips | Performance Style Autoclaved OEM+ Fitment

Dry-carbon rocker extensions for BMW G8X M3 and M4

Please select the correct chassis variant. Choosing the wrong option will not fit.

Give your G8X a lower, wider and more purposeful stance with autoclaved dry-carbon rocker panel extensions. Precisely modelled to follow the factory sill line, these aero side splitters add a track-inspired look without compromising everyday usability. The result is a clean, factory-plus appearance that complements other exterior upgrades and elevates the overall presence of your M car.

Why enthusiasts choose these sill blades

• G8X specific - shaped for the M3 Saloon G80, M3 Touring G81, M4 Coupe G82 and M4 Convertible G83
• Prepreg dry carbon construction for exceptional stiffness to weight
• CAD-modelled profiles for accurate alignment along the rocker panels
• Uses factory mounting locations for a secure, precise install
• Performance styling that visually lowers the car and sharpens the side view
• Consistent premium weave for a cohesive, OEM-plus aesthetic across your aero package

Real-world results

Our MJ Modifications team has installed these on customer G8X builds and on our own cars. Feedback is consistently positive on the fit, the quality of the carbon layup and the immediate visual drop they give. Customers love how these rocker extensions tie together front splitters, rear diffusers and spats for a balanced look on the G-series M3 and M4.

Compatibility

• BMW M3 G80 Saloon
• BMW M3 G81 Touring
• BMW M4 G82 Coupe
• BMW M4 G83 Convertible

Fitting and installation

Designed to utilise factory-style fixing points for a straightforward, secure fit. Professional installation recommended. MJ Modifications offers in-house fitting in Warwickshire. For a quote, email info@mjmodifications.co.uk.

Perfect pairing

Complete the look by combining these side splitters with matching rear diffuser elements and winglets from the same range for the G8X platform, achieving a unified carbon aesthetic from front to back.

Search-friendly terms

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