Adro BMW G20 M340I Pre-LCI Rear Diffuser

Upgrade the rear-end appearance of your 2020-2022 BMW G20 M340i Pre-LCI with this Carbon Fiber Rear Diffuser. Designed specifically for the G20 M340i platform, this diffuser adds a sharper and more aggressive lower rear bumper profile.

The pre-LCI design helps complete the rear of the vehicle with a premium carbon fiber accent that enhances the factory body lines. Its bold diffuser shape and included side fins create a more performance-inspired appearance while maintaining a clean OEM+ fitment style.

Constructed from wet carbon fiber, this rear diffuser delivers a premium glossy finish with strong visual impact. The kit includes one rear diffuser, two diffuser side fins, 3M tape, bolts/screws, and an installation manual for a complete rear-end styling upgrade.

Product Specifications

Key Features

• Designed for 2020-2022 BMW G20 M340i Pre-LCI models
• Rear diffuser design adds a more aggressive lower rear bumper profile
• Constructed from wet carbon fiber for a premium glossy exterior finish
• Includes two diffuser side fins for a more complete rear-end look
• Enhances the factory rear bumper with an OEM+ carbon fiber appearance
• Adds a sharper performance-inspired finish to the rear of the vehicle
• Designed specifically for pre-LCI G20 M340i fitment
• Includes 3M tape, bolts/screws, and installation manual

Configuration Options

• Wet carbon fiber rear diffuser configuration for BMW G20 M340i Pre-LCI models

Package Includes

• One rear diffuser
• Two diffuser side fins
• 3M tape
• Bolts/screws
• Installation manual

Note: This rear diffuser is designed for pre-LCI BMW G20 M340i models only. Professional installation is recommended to ensure proper alignment, secure mounting, and the best overall fitment.

Installation

• Test fit the rear diffuser and side fins before final mounting
• Clean and prepare the rear bumper mounting area before applying 3M tape
• Install using the included 3M tape and bolts/screws
• Follow the included installation manual during installation
• Check diffuser alignment and rear bumper clearance before final securing
• Professional installation is recommended for best results

Fitment

• 2020-2022 BMW G20 M340i Pre-LCI

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.