Tesla Model 3 Shark Fin Diffuser + Corner Extension Glossy Black 2017-2023

Upgrade the rear styling of your 2017-2023 Tesla Model 3 with this Glossy Black Shark Fin Diffuser and Corner Extension. Designed to add a more aggressive and performance-inspired appearance, this exterior upgrade enhances the lower rear profile of the vehicle.

The shark fin diffuser design creates a sharper, sportier look while the corner extensions help complete the rear bumper styling. The glossy black finish provides a clean contrast against the factory bodywork and pairs well with other exterior upgrades.

Built for Tesla Model 3 owners who want a bold rear-end accent, this diffuser and corner extension set delivers a noticeable styling improvement while maintaining a sleek, modern appearance.

Product Specifications

Key Features

• Designed for 2017-2023 Tesla Model 3 vehicles
• Shark fin diffuser design adds a more aggressive rear-end appearance
• Corner extensions help complete the lower rear bumper styling
• Glossy black finish creates a clean contrast against factory bodywork
• Enhances the vehicle’s sporty and modern exterior profile
• Pairs well with side skirts, rear spoilers, front lips, and other exterior upgrades
• Ideal for daily-driven, street, and show builds

Configuration Options

• Glossy black shark fin diffuser and corner extension configuration
• Designed as a rear bumper styling upgrade for Tesla Model 3 applications

Package Includes

• Glossy black shark fin diffuser
• Rear corner extensions
• Mounting hardware or adhesive if supplied by manufacturer

Note: Professional installation is recommended to ensure proper alignment, secure mounting, and best overall fitment.

Installation

• Installs onto the rear bumper / lower diffuser area
• Clean and prep all mounting surfaces before installation
• Test fitting is recommended before final installation
• May require supplied hardware or automotive-grade adhesive depending on configuration
• Professional installation is recommended for best results

Fitment

• 2017-2023 Tesla Model 3

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.