Audi A3 S3 RS3 8V Sedan S-Line BKSS Style Carbon Fiber Side Skirts Under Board with Winglets 2013-2020

Upgrade the side profile and aerodynamic styling of your 2013–2020 Audi A3, S3, or RS3 8V Sedan with these BKSS style carbon fiber side skirts under boards with integrated winglets. Designed to enhance the factory body lines, this upgrade delivers a sharper and more aggressive lower stance while maintaining clean OEM-style integration.

Engineered specifically for the Audi 8V sedan platform, these side skirt under boards are contoured to follow the natural lines of the vehicle. The added winglets provide an extra layer of performance-inspired styling, improving both the visual presence and aerodynamic character of the car.

Constructed from high-quality carbon fiber materials, these side skirts offer lightweight durability and a premium finish. Available in multiple configurations, they are ideal for enthusiasts seeking an OEM+ upgrade with enhanced styling and track-inspired detail.

Product Specifications

Key Features

• Designed for 2013–2020 Audi A3, S3, and RS3 8V Sedan models
• BKSS style side skirt under boards with integrated winglets
• Enhances lower body definition and aggressive side stance
• Winglets add performance-inspired aerodynamic styling
• Constructed from high-quality carbon fiber materials
• Available in CFRP and FGCF configurations
• Precision engineered for OEM+ fitment and alignment
• Lightweight construction for improved performance
• Suitable for street, show, and performance builds

Configuration Options

• CFRP – Carbon fiber reinforced polymer construction
• FGCF – Fiberglass base with carbon fiber finish

Package Includes

• One pair of side skirts under boards with winglets

Note: Products marked as PRE-ORDER require production before shipping. Air shipping is available at additional cost with an ETA of 5–6 weeks, while container shipping has no extra cost with an ETA of 3–4 months. Delivery times may vary depending on production schedule.

Installation

• Professional installation recommended
• Test fitting recommended prior to final installation
• Ensure proper alignment before securing components
• Installation method may vary depending on configuration

Fitment

• 2013-2020 Audi A3 Sedan (S-Line)
• 2013-2020 Audi S3 Sedan
• 2013-2020 Audi RS3 Sedan

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.