3D Design G26 4-Series Gran Coupe / i4 M-Sport Carbon Rear Diffuser

The 3D Design G26 4-Series Gran Coupe / i4 M-Sport Rear Diffuser delivers a purposeful aerodynamic enhancement to the lower rear fascia of both the G26 4-Series Gran Coupe and i4 M-Sport platform. Designed with a quad-exit profile, the diffuser integrates with the M-Sport rear bumper to create a more aggressive and visually complete lower rear presentation across all compatible G26 variants.

Note that the hands-free tailgate opening function may be impacted following installation. The 2x2 pre-preg carbon fiber construction delivers a gloss clearcoat finish that highlights the weave beneath, with OEM-level surface texture and consistent factory-style fitment.

Designed and manufactured in Japan, 3D Design components are developed with a focus on fitment precision, durability, and real-world usability. Their approach blends motorsport influence with street functionality, resulting in aerodynamic upgrades that enhance both form and function without sacrificing practicality.

Product Details

• Constructed from 2x2 pre-preg carbon fiber
• Designed for BMW G26 4-Series Gran Coupe M-Sport, M440i, i4 M-Sport, and i4 M50
• Quad-exit profile mounts to factory M-Sport rear bumper
• Standard G26 M-Sport models may require slight OEM component modification
• Includes installation hardware and instructions
• Designed and manufactured in Japan
• SKU: 3108-32612

Vehicle Applications

• BMW G26 4-Series Gran Coupe M-Sport and M440i

Notes

• Requires M-Sport rear bumper — standard G26 Gran Coupe M-Sport models may require slight modification of OEM components
• Hands-free tailgate opening function may be affected following installation
• 3D Design is a Japanese manufacturer known for precision-engineered BMW components developed for both street and circuit use
• As the exclusive North American distributor, IND Distribution guarantees all products are genuine 3D Design Japan components