Audi A3 S3 8V BKSS Style Carbon Fiber Rear Diffuser 2013-2016

Enhance the rear styling and aerodynamic performance of your 2013–2016 Audi A3 or S3 S-Line Sedan with this BKSS Style carbon fiber rear diffuser. Designed to deliver a more aggressive and performance-oriented appearance, this rear lip upgrade refines the lower bumper profile while maintaining clean OEM-style integration.

Precision engineered for the Audi 8V platform, this rear diffuser is contoured to match the factory rear bumper for seamless alignment and proper fitment. The BKSS style design improves airflow beneath the vehicle, contributing to enhanced aerodynamic efficiency and a more planted rear stance.

Constructed from high-quality composite and carbon fiber materials, this rear diffuser offers lightweight durability and premium finish options. It is an ideal upgrade for enthusiasts seeking to enhance both styling and aerodynamic performance for daily driving and performance builds.

Product Specifications

Key Features

• Designed for 2013–2016 Audi A3 and S3 S-Line Sedan models (8V)
• BKSS Style rear diffuser for aggressive rear styling upgrade
• Improves airflow beneath the vehicle for better aerodynamics
• Enhances rear bumper definition and sporty appearance
• Available in FRP, CFRP, and FGCF material options
• Lightweight construction with strong durability
• Precision molded for OEM-style fitment and alignment
• Maintains factory rear bumper while enhancing visual impact
• Ideal for street, show, and performance builds
• Simple add-on installation without full bumper replacement

Configuration Options

• FRP – Ideal for paint-matched applications
• CFRP – Carbon fiber construction with premium gloss finish
• FGCF – Hybrid fiberglass carbon fiber option for durability

Package Includes

• BKSS Style rear diffuser

Note: Professional installation is recommended to ensure proper alignment and secure mounting. Pre-order items may require additional production lead time depending on selected shipping method.

Installation

• Add-on installation to factory rear bumper
• Mounts using hardware or adhesive depending on setup
• No major modification required
• May require minor adjustments for perfect fitment
• Professional installation recommended

Fitment

• 2013 Audi A3 S-Line Sedan (8V)
• 2014 Audi A3 S-Line Sedan (8V)
• 2015 Audi A3 S-Line Sedan (8V)
• 2016 Audi A3 S-Line Sedan (8V)
• 2013 Audi S3 Sedan (8V)
• 2014 Audi S3 Sedan (8V)
• 2015 Audi S3 Sedan (8V)
• 2016 Audi S3 Sedan (8V)

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.