3D Design G20 3-Series M-Sport Carbon Rear Diffuser - 4-Tip

The 3D Design G20 / G21 3-Series M-Sport Rear Diffuser — 4-Tip enhances the lower rear of the G20 sedan and G21 Touring with a structured diffuser profile engineered for M340i and M-Sport trim levels equipped with four exhaust tips. 3D Design takes a proportion-first approach that integrates naturally with the factory M-Sport rear bumper, adding aerodynamic character and visual completeness to the rear end without overpowering the G20 platform's refined design language.

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 G20 / G21 3-Series with M-Sport Package or M340i trim
• Mounts to factory M-Sport rear bumper
• Configured for four exhaust tips — compatible with 3D Design quad exhaust or OEM M340i exhaust
• Non-M340i installations may require OEM parts 51128079607 and 51718091107
• Designed and manufactured in Japan
• SKU: 3108-32021

Vehicle Applications

• BMW G20 / G21 3-Series with M-Sport Package or M340i

Notes

• Requires factory M-Sport Package rear bumper — not compatible with non-M-Sport trims. Designed for 4-tip exhaust configurations only
• 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