Cadillac CT4 / CT4-V Carbon Fiber Rear Roof Window Spoiler 2020-Up

Enhance the rear roofline of your 2020-Present Cadillac CT4 or CT4-V with this carbon fiber rear roof top window spoiler kit. Engineered to follow the factory roof curvature and rear glass contour, this premium aerodynamic upgrade sharpens the vehicle’s rear profile while maintaining OEM-level fitment and seamless integration.

Constructed from genuine 3K 2x2 twill weave carbon fiber, the spoiler provides excellent structural rigidity while remaining lightweight. The consistent carbon weave alignment delivers a premium motorsport appearance that complements the luxury performance styling of the Cadillac CT4 platform.

The surface is protected by a high-gloss UV-resistant clear coat designed to prevent fading, oxidation, and discoloration from environmental exposure. Precision molding ensures the spoiler follows the upper edge of the rear glass, creating a clean airflow separation point that enhances high-speed stability and gives the rear silhouette a sharper performance aesthetic.

Product Specifications

Key Features

• Designed specifically for Cadillac CT4 and CT4-V sedan models
• Genuine 3K 2x2 twill weave carbon fiber construction
• Precision molded single-piece spoiler design
• Aerodynamic roof extension profile for improved airflow transition
• High-gloss UV-resistant protective clear coat
• Lightweight yet durable exterior upgrade
• Enhances rear roofline styling while maintaining OEM proportions
• Direct tape-on installation without drilling

Package Includes

• Carbon fiber rear roof window spoiler
• Automotive adhesive mounting hardware

Installation

• Direct tape-on installation using automotive-grade adhesive
• No drilling or permanent modification required
• Clean mounting surface thoroughly before installation
• Professional installation recommended for precise alignment

Fitment

• 2020-Present Cadillac CT4 Luxury
• 2020-Present Cadillac CT4 Premium Luxury
• 2020-Present Cadillac CT4 Sport
• 2020-Present Cadillac CT4-V
• 2022-Present Cadillac CT4-V Blackwing

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.