Maxton Design Carbon Fibre/Carbon Fiber Rear Diffuser Valance & Rear Bumper Insert for BMW M3 G80 Saloon (2021+) & M4 G82 Coupe (G8X) - Gloss Carbon Undertray, Rear Apron, Quad Exhaust Surround, OEM-Fit Performance Aero

Transform the rear of your BMW G8X with a premium carbon upgrade that looks factory fresh yet unmistakably motorsport. This high quality carbon-fibre lower bumper insert delivers a sharp, aggressive finish and a true performance aesthetic for the BMW M3 G80 and BMW M4 G82. Expect a precise profile, deep gloss weave and a strong, lightweight construction that elevates your car’s presence on the road and at shows.

Crafted by Maxton Design’s in-house carbon division, this rear valance is engineered around the original bumper for an authentic look and confident fit. Our team has fitted this piece on multiple customer cars and the feedback on fitment and finish has been outstanding. If you want a clean, purposeful upgrade that ties in perfectly with the G8X body lines, this is the one.

Compatibility

• BMW M3 G80 saloon, 2021 onwards
• BMW M4 G82 coupé, 2021 onwards

Why choose this carbon rear valance

• Real carbon fibre construction with a deep gloss clear finish
• Designed specifically for the G8X platform for confident alignment to the OEM bumper
• Motorsport inspired styling that enhances the rear profile and road presence
• Premium craftsmanship from Maxton Design’s carbon division
• Proven by our own installs and happy MJ Modifications customers

Common search terms

BMW M3 G80 rear valance, BMW M4 G82 carbon rear, G8X carbon rear insert, BMW rear bumper diffuser, carbon fibre rear undertray, BMW M3 rear apron, BMW M4 lower bumper trim, performance aero kit, carbon styling upgrade, BMW G8X diffuser upgrade, quad exhaust surround trim.

Fitting and support

Professional installation is recommended for the best finish. We offer fitting at MJ Modifications in Warwickshire. Request a quote at info@mjmodifications.co.uk.

Add this carbon rear piece to your G80 or G82 for a purposeful look and premium finish that stands out for all the right reasons.