Porsche 981 Cayman Boxster GT4 Style Carbon Fiber Rear Diffuser 2012-2016

Enhance the rear styling and aerodynamic performance of your 2012–2016 Porsche 981 Cayman or Boxster with this GT4 style carbon fiber rear diffuser. Inspired by the motorsport-focused GT4 design, this diffuser delivers a more aggressive and performance-driven appearance while maintaining seamless integration with the factory rear bumper.

Engineered specifically for the 981 platform, this rear diffuser ensures precise fitment and alignment with factory mounting points. The GT4 style design improves airflow beneath the rear bumper, contributing to enhanced aerodynamic efficiency and a more track-inspired rear profile.

Constructed from high-quality carbon fiber and composite materials, this diffuser offers lightweight durability and a premium finish. Multiple material options are available, allowing enthusiasts to select the ideal balance of strength, weight, and visual appeal for their build.

Product Specifications

Key Features

• Designed for 2012-2016 Porsche 981 Cayman and Boxster models
• GT4 style rear diffuser for aggressive motorsport-inspired styling
• Enhances rear-end aerodynamics and airflow efficiency
• Precision engineered for 981 platform fitment
• Constructed from high-quality carbon fiber and composite materials
• Available in FRP, CFRP, FGCF, and dry carbon fiber options
• Lightweight construction with strong durability
• UV-resistant clear coat for long-lasting finish protection
• Contours match factory rear bumper lines for seamless integration
• No major modification required for installation
• Suitable for street, show, and performance builds

Configuration Options

• FRP – Fiberglass construction for cost-effective builds
• CFRP – Full carbon fiber with gloss finish
• FGCF – Fiberglass base with carbon fiber overlay
• Dry Carbon Fiber – Premium lightweight construction with superior weave consistency

Package Includes

• Carbon fiber rear diffuser

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

Installation

• Direct bolt-on installation
• Uses factory mounting points
• No cutting required
• No major modification required
• Professional installation recommended

Fitment

• 2012-2016 Porsche Boxster 981
• 2012-2016 Porsche Cayman 981

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.