Turner Motorsport Carbon Fiber Rear Diffuser- F80 M3 / F82 M4

Rear valance upgrade for BMW F80 M3 and F82 M4

Give the back end of your BMW a sharper, motorsport-inspired finish with this Turner rear valance in premium CFRP. Designed to follow the F8X bodywork perfectly, it delivers a clean, aggressive look that suits both road and track style builds. Our team at MJ Modifications has fitted this part on customer cars and the feedback has been excellent. Fit and finish are superb and the transformation is immediate.

Why enthusiasts choose this rear diffuser insert

• Precisely developed using advanced 3D laser scanning and CAD for OE-style alignment
• Direct bolt-on to factory bumper insert points using original fasteners
• Made from lightweight, pre-preg 2x2 twill CFRP and autoclave cured for strength and rigidity
• High gloss clear coat with UV protection for long-lasting depth and clarity
• Heat resistance rated to 100°C continuous and 120°C intermittent
• Ample clearance for up to 4 inch tailpipe tips
• Can be painted for a colour-matched finish if desired

Quality you can see

This premium carbon rear bumper insert enhances the factory lines while keeping installation simple. The autoclave-cured pre-preg construction provides a crisp weave with excellent edge definition. The UV-stable clear coat helps maintain a deep gloss, ideal for show-quality results on BMW F80 and F82 platforms.

Fitting and support

Professional installation available at MJ Modifications in Warwickshire. For a fitting quote or any product questions, email info@mjmodifications.co.uk.

Search-friendly details

BMW M3 F80 rear valance. BMW M4 F82 rear bumper diffuser. Carbon rear undertray. CFRP rear lower trim. Gloss carbon 2x2 twill. Autoclave pre-preg carbon. OEM-fit bolt-on rear diffuser insert. Performance styling for F8X chassis. Carbon rear bumper lower. 4 inch exhaust tip clearance. UV clear coat carbon fibre. Track-inspired rear aero look. BMW M carbon rear upgrade.