BMW G20 3 Series 330i M340i CTM Carbon Fiber Rear Bumper Diffuser with Side Spats 2019-2022

Upgrade the rear-end appearance of your 2019-2022 BMW G20 3 Series 330i or M340i with this CTM Style Carbon Fiber Rear Bumper Diffuser and Side Spats Kit. Designed specifically for compatible G20 Sedans equipped with the M Sport rear bumper, this three-piece exterior upgrade adds an aggressive, motorsport-inspired appearance while complementing the vehicle's original body lines.

Constructed from genuine lightweight carbon fiber with a classic twill weave pattern, the rear diffuser features a high-gloss, UV-resistant clear-coated finish. Its distinctive CTM Style shark-fin profile and close-out exhaust opening design create a sporty rear-end appearance. The matching left and right corner side spats extend the lower bumper styling for a coordinated exterior finish.

Designed as a direct replacement for the factory rear bumper diffuser, the center section uses the vehicle's existing mounting locations. The matching corner side spats are direct add-on components installed using screws and clips. This kit is designed for compatible 2019-2022 BMW G20 3 Series Sedans with M Sport rear bumpers. Professional installation is recommended to ensure proper alignment and secure attachment.

Product Specifications

Key Features

• Designed for compatible 2019-2022 BMW G20 3 Series Sedans with M Sport rear bumpers
• CTM Style rear diffuser with an aggressive shark-fin profile
• Close-out exhaust opening design for a distinctive rear appearance
• Genuine lightweight carbon fiber construction
• Classic carbon fiber twill weave pattern
• High-gloss UV-resistant clear-coated finish
• Matching carbon fiber side spats for both rear bumper corners
• Coordinated three-piece exterior styling kit
• Center diffuser designed to replace the original factory diffuser
• Uses factory mounting locations for the center diffuser
• Side spats attach using screws and clips
• Enhances the lower rear bumper with a motorsport-inspired appearance

Configuration Options

• BMW G20 330i: Compatible 2019-2022 3 Series Sedan models equipped with the M Sport rear bumper.
• BMW G20 M340i: Compatible 2019-2022 3 Series Sedan models with the appropriate M Sport-style rear bumper configuration.
• Rear Bumper: M Sport design only.
• Diffuser Style: CTM Style shark-fin profile with close-out exhaust openings.
• Material and Finish: Real carbon fiber with twill weave and a glossy UV-resistant clear coat.

Package Includes

• 1 x CTM Style Real Carbon Fiber Rear Bumper Diffuser
• 1 x Left Carbon Fiber Rear Bumper Side Spat
• 1 x Right Carbon Fiber Rear Bumper Side Spat

Note: Designed for compatible 2019-2022 BMW G20 3 Series Sedans with the M Sport rear bumper only. This kit is not compatible with standard non-M Sport rear bumpers. Please verify the vehicle's model year, bumper configuration, exhaust outlet layout, and factory mounting locations before ordering. The center diffuser is a direct replacement, while the corner side spats require additional mounting with screws and clips. Mounting hardware inclusion is not specified. Installation instructions are not included. Professional installation is recommended. Test fitting is recommended before final installation.

Installation

• Confirm that the vehicle has a compatible BMW G20 M Sport rear bumper.
• Remove the existing factory rear bumper diffuser.
• Test fit the carbon fiber center diffuser to verify alignment with the factory mounting points and exhaust openings.
• Install and secure the replacement rear diffuser using the appropriate factory mounting locations.
• Position the left and right corner side spats along the lower rear bumper.
• Secure the corner extensions using suitable screws and clips.
• Check the fitment and clearance around the exhaust outlets.
• Verify all components are securely attached before driving.
• Professional installation is recommended.
• Test fitting is recommended before final installation.

Fitment

• 2019-2022 BMW G20 330i 3 Series Sedan with M Sport rear bumper
• 2019-2022 BMW G20 M340i 3 Series Sedan with compatible factory rear bumper
• Compatible with pre-facelift G20 Sedan applications
• Requires M Sport rear bumper configuration
• Not compatible with standard non-M Sport rear bumpers
• Confirm the rear bumper shape, exhaust outlets, and mounting points before ordering

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 Retrofits & 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: 1-2 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.