Description
Carbon Fiber CSMT Style Rear Diffuser for BMW G20 3 Series (M340i)
Enhance the rear-end presence of your BMW G20 3 Series with the premium Carbon Fiber CSMT Style Rear Diffuser, engineered to deliver aggressive motorsport-inspired styling with refined OEM integration. The CSMT-style design introduces sharp aerodynamic fins and a sculpted lower profile that visually widens the rear stance while adding depth and performance character to the G20 platform.
Constructed from high-quality carbon fiber, this rear diffuser offers an optimal balance of lightweight performance, structural rigidity, and premium aesthetics. The precision-molded design ensures seamless integration with factory bumper lines, while the high-gloss UV-resistant clear coat protects against fading, yellowing, and environmental wear for long-lasting finish quality.
The aggressive fin layout enhances the vehicle’s rear visual dynamics, creating a more planted and track-inspired appearance without compromising daily usability. It is an ideal upgrade for enthusiasts building a cohesive OEM+ carbon exterior package.
Whether paired with a carbon front lip, side skirts, or trunk spoiler, the CSMT-style diffuser completes the rear profile with a bold yet refined performance look.
Key Features
- Aggressive CSMT-style aerodynamic design
- Premium lightweight carbon fiber construction
- Sharp rear fins for enhanced visual width and depth
- High-gloss UV-resistant clear coat
- OEM-style fitment with factory bumper integration
- Enhances rear-end stance and performance styling
- Designed for durability and long-term finish stability
Vehicle Fitment
- BMW G20 3 Series (2019–Present)
- 330i / 330i xDrive
- M340i / M340i xDrive
- Requires M Sport rear bumper
Installation Notes
- Professional installation recommended
- Direct replacement of factory rear diffuser
- Test fit prior to final installation
- Hardware included
Carbon Weave Options
Standard finish includes premium 2x2 carbon fiber weave. Optional finishes available upon request:
- Matte Carbon Fiber
- Forged Carbon Fiber
- 1x1 Carbon Fiber
Custom requests can be submitted via the Custom Product Inquiry Section.
Durability & Protection
Engineered for long-term performance, this diffuser features high-grade UV protection to resist fading, oxidation, and environmental damage while maintaining a premium carbon finish over time.
Warranty
Includes a 30-day standard warranty covering fitment issues or shipping damage prior to installation. Warranty does not cover post-installation damage or improper installation.
