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Audi B8 A5 S-Line / S5 KB Style Carbon Fiber Rear Diffuser with 3rd Br - E GUYS INC. | Audi B8 A5 S-Line / S5 KB Style Carbon Fiber Rear Diffuser with 3rd Br - E GUYS INC. | Audi B8 A5 S-Line / S5 KB Style Carbon Fiber Rear Diffuser with 3rd Br - E GUYS INC. | Audi B8 A5 S-Line / S5 KB Style Carbon Fiber Rear Diffuser with 3rd Br - E GUYS INC. | Audi B8 A5 S-Line / S5 KB Style Carbon Fiber Rear Diffuser with 3rd Br - E GUYS INC. | Audi B8 A5 S-Line / S5 KB Style Carbon Fiber Rear Diffuser with 3rd Br - E GUYS INC. | Audi B8 A5 S-Line / S5 KB Style Carbon Fiber Rear Diffuser with 3rd Br - E GUYS INC. | Audi B8 A5 S-Line / S5 KB Style Carbon Fiber Rear Diffuser with 3rd Br - E GUYS INC. | Audi B8 A5 S-Line / S5 KB Style Carbon Fiber Rear Diffuser with 3rd Br - E GUYS INC. | Audi B8 A5 S-Line / S5 KB Style Carbon Fiber Rear Diffuser with 3rd Br - E GUYS INC. | Audi B8 A5 S-Line / S5 KB Style Carbon Fiber Rear Diffuser with 3rd Br - E GUYS INC. | Audi B8 A5 S-Line / S5 KB Style Carbon Fiber Rear Diffuser with 3rd Br - E GUYS INC. | Audi B8 A5 S-Line / S5 KB Style Carbon Fiber Rear Diffuser with 3rd Br - E GUYS INC. | Audi B8 A5 S-Line / S5 KB Style Carbon Fiber Rear Diffuser with 3rd Br - E GUYS INC. | Audi B8 A5 S-Line / S5 KB Style Carbon Fiber Rear Diffuser with 3rd Br - E GUYS INC. | Audi B8 A5 S-Line / S5 KB Style Carbon Fiber Rear Diffuser with 3rd Br - E GUYS INC. | Audi B8 A5 S-Line / S5 KB Style Carbon Fiber Rear Diffuser with 3rd Br - E GUYS INC. | Audi B8 A5 S-Line / S5 KB Style Carbon Fiber Rear Diffuser with 3rd Br - E GUYS INC. | Audi B8 A5 S-Line / S5 KB Style Carbon Fiber Rear Diffuser with 3rd Br - E GUYS INC. | Audi B8 A5 S-Line / S5 KB Style Carbon Fiber Rear Diffuser with 3rd Br - E GUYS INC. | Audi B8 A5 S-Line / S5 KB Style Carbon Fiber Rear Diffuser with 3rd Br - E GUYS INC. | Audi B8 A5 S-Line / S5 KB Style Carbon Fiber Rear Diffuser with 3rd Br - E GUYS INC. | Audi B8 A5 S-Line / S5 KB Style Carbon Fiber Rear Diffuser with 3rd Br - E GUYS INC. | Audi B8 A5 S-Line / S5 KB Style Carbon Fiber Rear Diffuser with 3rd Br - E GUYS INC. | Audi B8 A5 S-Line / S5 KB Style Carbon Fiber Rear Diffuser with 3rd Br - E GUYS INC. | Audi B8 A5 S-Line / S5 KB Style Carbon Fiber Rear Diffuser with 3rd Br - E GUYS INC. | Audi B8 A5 S-Line / S5 KB Style Carbon Fiber Rear Diffuser with 3rd Br - E GUYS INC. | Audi B8 A5 S-Line / S5 KB Style Carbon Fiber Rear Diffuser with 3rd Br - E GUYS INC. | Audi B8 A5 S-Line / S5 KB Style Carbon Fiber Rear Diffuser with 3rd Br - E GUYS INC. | Audi B8 A5 S-Line / S5 KB Style Carbon Fiber Rear Diffuser with 3rd Br - E GUYS INC. | Audi B8 A5 S-Line / S5 KB Style Carbon Fiber Rear Diffuser with 3rd Br - E GUYS INC. | Audi B8 A5 S-Line / S5 KB Style Carbon Fiber Rear Diffuser with 3rd Br - E GUYS INC. | Audi B8 A5 S-Line / S5 KB Style Carbon Fiber Rear Diffuser with 3rd Br - E GUYS INC. | Audi B8 A5 S-Line / S5 KB Style Carbon Fiber Rear Diffuser with 3rd Br - E GUYS INC. | Audi B8 A5 S-Line / S5 KB Style Carbon Fiber Rear Diffuser with 3rd Br - E GUYS INC. | Audi B8 A5 S-Line / S5 KB Style Carbon Fiber Rear Diffuser with 3rd Br - E GUYS INC. | Audi B8 A5 S-Line / S5 KB Style Carbon Fiber Rear Diffuser with 3rd Br - E GUYS INC. | Audi B8 A5 S-Line / S5 KB Style Carbon Fiber Rear Diffuser with 3rd Br - E GUYS INC. | Audi B8 A5 S-Line / S5 KB Style Carbon Fiber Rear Diffuser with 3rd Br - E GUYS INC. | Audi B8 A5 S-Line / S5 KB Style Carbon Fiber Rear Diffuser with 3rd Br - E GUYS INC. | Audi B8 A5 S-Line / S5 KB Style Carbon Fiber Rear Diffuser with 3rd Br - E GUYS INC. | Audi B8 A5 S-Line / S5 KB Style Carbon Fiber Rear Diffuser with 3rd Br - E GUYS INC. | Audi B8 A5 S-Line / S5 KB Style Carbon Fiber Rear Diffuser with 3rd Br - E GUYS INC. | Audi B8 A5 S-Line / S5 KB Style Carbon Fiber Rear Diffuser with 3rd Br - E GUYS INC. | Audi B8 A5 S-Line / S5 KB Style Carbon Fiber Rear Diffuser with 3rd Br - E GUYS INC. | Audi B8 A5 S-Line / S5 KB Style Carbon Fiber Rear Diffuser with 3rd Br - E GUYS INC. | Audi B8 A5 S-Line / S5 KB Style Carbon Fiber Rear Diffuser with 3rd Br - E GUYS INC. | Audi B8 A5 S-Line / S5 KB Style Carbon Fiber Rear Diffuser with 3rd Br - E GUYS INC. | Audi B8 A5 S-Line / S5 KB Style Carbon Fiber Rear Diffuser with 3rd Br - E GUYS INC. | Audi B8 A5 S-Line / S5 KB Style Carbon Fiber Rear Diffuser with 3rd Br - E GUYS INC. | Audi B8 A5 S-Line / S5 KB Style Carbon Fiber Rear Diffuser with 3rd Br - E GUYS INC. | Audi B8 A5 S-Line / S5 KB Style Carbon Fiber Rear Diffuser with 3rd Br - E GUYS INC.

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    • Home
    • Audi Shop All Carbon
    • Audi B8 A5 S-Line / S5 KB Style Carbon Fiber Rear Diffuser with 3rd Brake Light (2008–2012)
    Audi B8 A5 S-Line / S5 KB Style Carbon Fiber Rear Diffuser with 3rd Brake Light (2008–2012)
    Audi B8 A5 S-Line / S5 KB Style Carbon Fiber Rear Diffuser with 3rd Brake Light (2008–2012)
    Audi B8 A5 S-Line / S5 KB Style Carbon Fiber Rear Diffuser with 3rd Brake Light (2008–2012)
    Audi B8 A5 S-Line / S5 KB Style Carbon Fiber Rear Diffuser with 3rd Brake Light (2008–2012)
    Audi B8 A5 S-Line / S5 KB Style Carbon Fiber Rear Diffuser with 3rd Brake Light (2008–2012)
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    Audi B8 A5 S-Line / S5 KB Style Carbon Fiber Rear Diffuser with 3rd Brake Light (2008–2012)

    $949.99
    Audi B8 A4/S4 Carbon Fiber Vented Hood
    Audi B8 A4/S4 Carbon Fiber Vented Hood
    $1,999.99 - $2,399.99
    Audi B8.5 A4/S4 Carbon Fiber Vented Hood
    Audi B8.5 A4/S4 Carbon Fiber Vented Hood
    $1,999.99 - $2,399.99
    Audi B8 A5 S-Line / S5 KB Style Carbon Fiber Rear Diffuser with 3rd Brake Light (2008–2012)
    Description

    Transform the rear end of your Audi B8 A5 S-Line or S5 with our KB Style Carbon Fiber Rear Diffuser, complete with an integrated 3rd brake light. Designed to bring an aggressive, motorsport-inspired look, this diffuser enhances both visual appeal and aerodynamic performance. Crafted from high-quality carbon fiber and finished in a deep gloss clear coat, it's the perfect addition for any enthusiast looking to upgrade their exterior aesthetics.

    Key Features:

    • KB Style Design: Inspired by track-ready styling for a bold, performance-driven appearance.

    • Premium Carbon Fiber Construction: Made from lightweight, high-strength carbon fiber with a UV-resistant gloss finish for durability and shine.

    • Integrated 3rd Brake Light: Adds both style and safety, seamlessly integrated into the diffuser design.

    • Direct Bolt-On Fitment: Engineered to fit OEM mounting points with no major modifications required.

    • Enhanced Aerodynamics: Improves rear airflow and reduces drag for a subtle performance edge.

    Fitment:

    • Audi B8 S5 Coupe & Cabriolet (V8 models): 2008–2012

    • Audi B8 A5 S-Line Coupe & Cabriolet: 2008–2012
      Compatible only with S-Line and S5 rear bumpers (not standard A5 models without S-Line trim).

    Specifications:

    • Material: Real Carbon Fiber

    • Finish: Glossy Clear Coat with UV Protection

    • Style: KB Aero Design with Central Brake Light Cutout

    Package Includes:

    • 1x KB Style Carbon Fiber Rear Diffuser

    • 1x Integrated 3rd Brake Light

    Installation Notes:
    Professional installation is recommended. Some wiring may be required to connect the included 3rd brake light.

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    Shipping Information for Performance Parts

    We proudly ship parts worldwide! All orders are processed Monday through Friday. Please allow 1-3 business days for order processing before shipment. We do not ship on weekends or public holidays.

    Estimated Shipping Times:
    U.S. & Canada: 7-21 business days
    International: 10-35 business days (varies by location and customs processing)
    Larger or Oversized Items: May take longer due to handling, packaging, and freight requirements

    Shipping times may be affected by product availability, high demand, holidays, or unforeseen circumstances. For order updates, contact us at info@eguysperformance.com or DM us on Instagram @eguysperformance with your order number.

    Shipping Rates: Calculated at checkout based on location and order weight
    Customs & Import Taxes: International orders may incur fees, duties, and taxes determined by local customs offices. These charges are the buyer’s responsibility. We are not liable for customs delays.

    What Does the E Guys Performance Lifetime Warranty Cover?

    Our Lifetime Warranty is designed to give you peace of mind. Here’s what’s included:

    Available to the Original Purchaser: This warranty applies exclusively to the original purchaser of the product. Coverage is valid for purchases made directly from E Guys Performance or through an authorized dealer.
    Manufacturer Defects: We cover defects in materials or workmanship. If a product fails due to a manufacturing issue, we will repair or replace it at no cost.
    Shipping Costs for Warranty Claims: We cover shipping costs for replacement parts on approved warranty claims, so you won’t incur additional fees.

    What Isn’t Covered?

    Improper Use or Installation: Damage from incorrect installation, misuse, accidents, or normal wear and tear is not covered.
    Modifications: Any modifications made to the product will void the warranty.
    Intended Use: Products must be used as intended for the warranty to remain valid.

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