McLaren 540C 570S 600LT BKSS Style Carbon Fiber Side Skirts Under Board 2015-2021

Upgrade the lower side profile of your 2015-2021 McLaren 540C, 570S, or 600LT with these BKSS Style carbon fiber side skirts under board. Designed for McLaren Sports Series models, this exterior aero upgrade adds a lower, wider, and more aggressive appearance while maintaining clean integration with the vehicle’s factory body lines.

This pair of BKSS style side skirts under board enhances the lower rocker panel area with sharper side definition and a more motorsport-inspired profile. The design helps visually connect the front and rear aero sections, giving the McLaren a more complete and performance-focused exterior presence from the side view.

Available in CFRP, FGCF, and DryCF material options, these side skirts under board provide multiple configuration choices depending on the desired construction, finish, and styling preference. This upgrade is ideal for street, show, and track-inspired McLaren builds seeking premium carbon fiber lower side aero detail.

Product Specifications

Key Features

• Designed for 2015-2021 McLaren 540C, 570S, and 600LT models
• BKSS style side skirts under board for a sharper lower side profile
• Enhances the rocker panel area with premium carbon fiber styling
• Complements front splitter, rear diffuser, and other exterior aero upgrades
• Available in CFRP, FGCF, and DryCF material options
• Designed to follow the factory McLaren body lines for clean integration
• Adds lower side definition and a more aggressive visual stance
• Improves the vehicle’s motorsport-inspired exterior appearance
• Suitable for street, show, and track-inspired McLaren builds

Configuration Options

• CFRP – Carbon fiber reinforced plastic option for a premium carbon fiber finish
• FGCF – Fiberglass carbon fiber option for durable carbon fiber-style construction
• DryCF – Dry carbon fiber option for lightweight performance-focused styling

Package Includes

• One pair of carbon fiber side skirts under board
• Left side skirt under board
• Right side skirt under board

Note: Professional installation is recommended to ensure proper alignment, secure mounting, and protection of the selected finish during installation. Made-to-order material options may require additional production time before shipping.

Installation

• Side skirt under board installation
• Test fitting is recommended before final mounting
• Surface preparation may be required before installation
• Adhesive and/or hardware may be required depending on installation method
• Professional installation recommended
• Additional adjustment may be required for proper alignment and panel fitment

Fitment

• 2015-2021 McLaren 540C
• 2015-2021 McLaren 570S
• 2018-2021 McLaren 600LT

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.