BMW G20 330i M340i CTM Style Gloss Black Rear Diffuser With Corner Spats 2019-2022

Upgrade the rear-end styling and aerodynamic profile of your 2019-2022 BMW G20 3 Series with this CTM Style gloss black rear diffuser with corner spats. Designed for 330i and M340i sedan models equipped with the M Sport bumper, this diffuser adds a sharper and more aggressive rear appearance.

The CTM Style rear diffuser helps optimize airflow around the rear bumper while reducing drag and enhancing the vehicle’s performance-inspired presence. The included corner spats further amplify the race-inspired look and contribute to a more planted rear profile.

Finished in gloss black, this diffuser creates a clean contrast against the vehicle’s paint and pairs well with other black or carbon-style exterior upgrades. It is ideal for BMW G20 owners looking to enhance the factory M Sport bumper with a bold OEM+ rear aero upgrade.

Product Specifications

Key Features

• Designed for 2019-2022 BMW G20 3 Series sedan models with M Sport bumper
• Compatible with 330i and M340i models
• CTM Style rear diffuser design with corner spats
• Gloss black finish adds a clean and aggressive rear-end accent
• Helps optimize rear airflow and reduce drag
• Corner spats add a race-inspired look and enhanced aero presence
• Complements the factory M Sport rear bumper design

Configuration Options

• CTM Style rear diffuser design
• Gloss black finish
• Corner spats included

Package Includes

• Gloss black rear diffuser
• Corner spats
• Mounting hardware or adhesive, if supplied by manufacturer

Note: Only fits BMW G20 sedan models with the M Sport bumper. Will not fit Sport Line or Luxury models. Modification on the rectangle exhaust tips may be required for M340i models.

Installation

• Installs onto the rear M Sport bumper area
• Test fitting is recommended before final installation
• May require adhesive, clips, screws, or additional mounting preparation depending on vehicle configuration
• M340i models may require modification on the rectangle exhaust tips
• Professional installation is recommended for best results

Fitment

• 2019-2022 BMW G20 330i 3 Series sedan with M Sport bumper
• 2019-2022 BMW G20 M340i 3 Series sedan with M Sport bumper
• Will not fit Sport Line models
• Will not fit Luxury models

United States: Free shipping available to the lower 48 states across all items. Other states will incur a shipping charge.

Worldwide: Free shipping is available for Complete Headlights, Taillights, DRLs. For custom headlight retrofits, carbon fiber products, and performance products, there will be a shipping charge.  

Please note:
• For Retrofits, you are purchasing a headlight modification service.
• If you select "Shipping own headlights to BayOptiks for modification", you are required to send us your headlights.
• If you choose "Purchase new OEM headlights", we will order and modify a new OEM headlight for you.
• Once your customizations are complete, we will ship it to you!

• Complete Headlights: 3-5 business days for order processing plus shipping time.
• Custom & Pre-Built Headlights: 6-8 weeks depending on the complexity and component availability.
• New OEM and cores: 6-8 weeks plus an additional 4-8 weeks as these are special orders base on the vehicle VIN due to different versions (North American, European, etc.)
• DRLs, Taillights, Brake Pads, and Carbon Fiber Aero: 3-5 business days for order processing, plus shipping time.
• Lens Replacements: 1-3 weeks plus shipping time.

Please note, we do not have control over the time frames of our vendors, manufacturers, and delivery services as they may delay processes in regards to components and shipment.