Porsche 911 991.2 GT3 BKSS Style Carbon Fiber Rear Diffuser 2017-2019

Enhance the rear styling and aerodynamic performance of your 2017-2019 Porsche 911 991.2 GT3 with this BKSS Style carbon fiber rear diffuser. Designed exclusively for the GT3 platform, this diffuser delivers a more aggressive and performance-focused rear-end appearance while maintaining precise OEM-style integration.

The BKSS design features sharp contours and extended aerodynamic elements that improve rear bumper definition and overall vehicle stance. Engineered specifically for the 991.2 GT3 rear bumper, this diffuser ensures accurate fitment and seamless alignment with factory body lines.

Constructed from high-quality carbon fiber materials, this rear diffuser offers lightweight durability and premium finish quality. Available in multiple material options, it is ideal for enthusiasts seeking to enhance both styling and aerodynamic presence.

Product Specifications

Key Features

• Designed for 2017-2019 Porsche 911 991.2 GT3 models only
• BKSS style rear diffuser for aggressive rear-end styling
• Enhances aerodynamic performance and rear airflow management
• Improves rear bumper definition and overall stance
• Precision engineered for OEM-style fitment and alignment
• Constructed from high-quality carbon fiber materials
• Lightweight and durable construction
• Available in multiple material and finish options
• Seamlessly integrates with factory GT3 rear bumper
• Ideal for street, show, and performance builds

Configuration Options

• CFRP – Standard carbon fiber construction with gloss finish
• FGCF – Fiberglass base with carbon fiber overlay
• Dry Carbon Fiber – Lightweight pre-preg carbon fiber with premium weave quality
• MTCF – Matte carbon fiber finish option

Package Includes

• Rear diffuser

Note: This product is designed exclusively for Porsche 911 991.2 GT3 models and will not fit other variants. Professional installation is recommended for proper alignment and fitment.

Installation

• Installation manual available
• Professional installation recommended

Fitment

• 2017-2019 Porsche 911 991.2 GT3
• Fits GT3 models only

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.