Porsche 718 Cayman Boxster GT4 Style Dry Carbon Fiber Rear Diffuser Lip 2017-2025

Enhance the rear styling and aerodynamic performance of your 2017–2025 Porsche 718 Cayman and Boxster with this GT4 Style dry carbon fiber rear diffuser lip. Designed to replicate the aggressive GT4-inspired appearance, this upgrade adds a sharper and more performance-focused lower rear profile.

Precision engineered for the 718 platform, this rear diffuser lip integrates seamlessly with the factory bumper using original mounting points for a secure and precise fit. The GT4 Style design enhances the rear bumper structure, improving airflow characteristics and giving the vehicle a more track-inspired and dynamic stance.

Constructed from premium dry carbon fiber, this diffuser lip offers exceptional strength, lightweight performance, and consistent weave quality. Ideal for both daily driving and performance builds, it provides a refined OEM+ upgrade with enhanced durability and visual impact.

Product Specifications

Key Features

• Designed for 2017–2025 Porsche 718 Cayman and Boxster models
• GT4 Style rear diffuser lip for aggressive track-inspired styling
• Enhances rear bumper definition and sporty appearance
• Improves aerodynamic airflow and performance aesthetics
• Dry carbon fiber construction for lightweight strength and durability
• Autoclave-cured material for consistent weave and premium finish
• Precision engineered for OEM+ fitment and seamless integration
• Uses factory mounting points for secure installation
• No major modifications required
• Suitable for daily driving and performance builds

Configuration Options

• Dry Carbon Fiber – Premium exposed carbon weave for a motorsport-inspired finish

Package Includes

• Rear diffuser lip

Note: Professional installation is recommended to ensure proper alignment and secure mounting using factory hardware.

Installation

• Direct replacement installation
• Uses original factory mounting points and screw holes
• No drilling required
• No cutting required
• Professional installation recommended

Fitment

• 2017-2025 Porsche 718 Cayman
• 2017-2025 Porsche 718 Boxster

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.