3DDesign Carbon Fibre Rear Diffuser / Lower Valance & Splitter for MINI F56 JCW (2015+) – MINI Hatch Mk3 John Cooper Works Rear Bumper Insert, Performance Aero Undertray, OEM+ Gloss Carbon Fiber

Transform the rear of your F56 JCW with a premium carbon fibre aero upgrade

Give your Mk3 MINI Hatch the aggressive, motorsport-inspired look it deserves with this 3DDesign carbon fibre rear lower valance. Purpose-built for the factory John Cooper Works bumper on the F56 (2015 onwards), this precision piece delivers that OEM+ finish enthusiasts want while adding serious visual presence and performance styling to the back end.

Crafted by 3DDesign for a tailored fit on the JCW bumper, this carbon upgrade enhances the diffuser area with sculpted fins and crisp lines for a sharper stance. Expect a premium carbon fibre construction, a superb finish, and a design that complements the JCW exhaust layout and rear contours perfectly.

Why enthusiasts choose this carbon upgrade

• Designed specifically for the F56 John Cooper Works rear bumper for a clean, factory-style integration
• Premium carbon fibre construction for a high-end look and lightweight performance styling
• Track-inspired aesthetics: deeper fins, bolder rear profile, and a more purposeful stance
• OEM+ appearance that pairs perfectly with JCW styling and other aero or body kit components
• Trusted brand quality from 3DDesign for consistency and fit

We’ve installed this upgrade on customer cars at MJ Modifications in Warwickshire and feedback has been excellent: tighter fit, stunning weave, and a transformative look that finishes the rear of the car properly.

What’s in the box

• 1 x 3DDesign carbon fibre rear lower diffuser unit

Fitment and compatibility

• MINI John Cooper Works F56, 2015 onwards (designed to mount to the JCW rear bumper)

Professional installation recommended. For fitting at our Warwickshire workshop, request a quote: info@mjmodifications.co.uk

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