BMW M4 G82/G83 Rear Bumper Diffuser / Rear Valance Carbon Fibre (Carbon Fiber) by 3D Design (2021+, Coupe & Convertible) – CFRP One-Piece Rear Bumper Lower Trim Insert – Fits M4 & M4 Competition – Performance Carbon Aero

3D Design G82 G83 M4 Carbon Rear Valance Insert in CFRP | Single-piece | Part No. 3108-38212

Transform the back end of your G-series M4 with this Japan-engineered carbon rear trim from 3D Design. Crafted as a single-piece carbon composite lower insert, it delivers a race-bred look, sharper aero detailing and a premium finish that elevates the standard bumper. If you are searching for a high-end carbon rear valance for a 2021-on M4 Coupe or M4 Convertible, this is the benchmark upgrade for quality, fit and appearance.

Why enthusiasts choose it

• Single-piece CFRP construction for outstanding rigidity and long-term durability
• Vacuum-infused carbon for a consistent weave and deep, high-gloss clear coat
• Precision engineered by 3D Design specifically for G82 and G83 platforms
• Race-inspired sculpting and defined aero strakes that amplify presence
• Refined, factory-plus fitment that pairs perfectly with other carbon upgrades
• Designed to enhance the rear profile and complement the M4’s lines

We have supplied, installed and driven with this 3D Design rear valance on customer cars and our own. Feedback is consistently superb on the alignment, finish and the way it transforms the stance without compromising OEM refinement. It is the premium choice for owners who want a luxury-grade carbon upgrade that looks and feels right at home on an M car.

Compatibility

• BMW G82 M4 Coupe 2021 onwards
• BMW G82 M4 Competition Coupe 2021 onwards
• BMW G83 M4 Convertible 2021 onwards, including Competition

Part number: 3108-38212

Fitting service

Professional installation is recommended for the best result. MJ Modifications offers expert fitting at our Warwickshire workshop. Request a quote at info@mjmodifications.co.uk.

Compatibility check before dispatch

For complete peace of mind, we can verify suitability prior to shipping. Provide your UK registration or the last 7 digits of your VIN at checkout and we will confirm this 3D Design carbon rear valance is correct for your vehicle build.

Search-friendly terms

G82 M4 carbon rear valance, G83 M4 carbon rear lower trim, M4 Competition carbon lower bumper insert, 3D Design aero rear insert for M4, carbon composite rear underbody trim M4, BMW M4 carbon tail finisher, G-series M4 carbon rear undertray styling, performance carbon rear bumper insert M4, M4 carbon rear fins, premium CFRP rear valance BMW M4, G82 G83 performance rear carbon upgrade, 3D Design carbon aero for BMW M4, BMW M4 carbon rear styling piece, M4 back bumper carbon insert.