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Audi B8.5 A5 S-Line / S5 KB Style Carbon Fiber Rear Diffuser with 3rd - E GUYS INC. | Audi B8.5 A5 S-Line / S5 KB Style Carbon Fiber Rear Diffuser with 3rd - E GUYS INC. | Audi B8.5 A5 S-Line / S5 KB Style Carbon Fiber Rear Diffuser with 3rd - E GUYS INC. | Audi B8.5 A5 S-Line / S5 KB Style Carbon Fiber Rear Diffuser with 3rd - E GUYS INC. | Audi B8.5 A5 S-Line / S5 KB Style Carbon Fiber Rear Diffuser with 3rd - E GUYS INC. | Audi B8.5 A5 S-Line / S5 KB Style Carbon Fiber Rear Diffuser with 3rd - E GUYS INC. | Audi B8.5 A5 S-Line / S5 KB Style Carbon Fiber Rear Diffuser with 3rd - E GUYS INC. | Audi B8.5 A5 S-Line / S5 KB Style Carbon Fiber Rear Diffuser with 3rd - E GUYS INC. | Audi B8.5 A5 S-Line / S5 KB Style Carbon Fiber Rear Diffuser with 3rd - E GUYS INC. | Audi B8.5 A5 S-Line / S5 KB Style Carbon Fiber Rear Diffuser with 3rd - E GUYS INC. | Audi B8.5 A5 S-Line / S5 KB Style Carbon Fiber Rear Diffuser with 3rd - E GUYS INC. | Audi B8.5 A5 S-Line / S5 KB Style Carbon Fiber Rear Diffuser with 3rd - E GUYS INC. | Audi B8.5 A5 S-Line / S5 KB Style Carbon Fiber Rear Diffuser with 3rd - E GUYS INC. | Audi B8.5 A5 S-Line / S5 KB Style Carbon Fiber Rear Diffuser with 3rd - E GUYS INC. | Audi B8.5 A5 S-Line / S5 KB Style Carbon Fiber Rear Diffuser with 3rd - E GUYS INC. | Audi B8.5 A5 S-Line / S5 KB Style Carbon Fiber Rear Diffuser with 3rd - E GUYS INC. | Audi B8.5 A5 S-Line / S5 KB Style Carbon Fiber Rear Diffuser with 3rd - E GUYS INC. | Audi B8.5 A5 S-Line / S5 KB Style Carbon Fiber Rear Diffuser with 3rd - E GUYS INC. | Audi B8.5 A5 S-Line / S5 KB Style Carbon Fiber Rear Diffuser with 3rd - E GUYS INC. | Audi B8.5 A5 S-Line / S5 KB Style Carbon Fiber Rear Diffuser with 3rd - E GUYS INC. | Audi B8.5 A5 S-Line / S5 KB Style Carbon Fiber Rear Diffuser with 3rd - E GUYS INC. | Audi B8.5 A5 S-Line / S5 KB Style Carbon Fiber Rear Diffuser with 3rd - E GUYS INC. | Audi B8.5 A5 S-Line / S5 KB Style Carbon Fiber Rear Diffuser with 3rd - E GUYS INC. | Audi B8.5 A5 S-Line / S5 KB Style Carbon Fiber Rear Diffuser with 3rd - E GUYS INC. | Audi B8.5 A5 S-Line / S5 KB Style Carbon Fiber Rear Diffuser with 3rd - E GUYS INC. | Audi B8.5 A5 S-Line / S5 KB Style Carbon Fiber Rear Diffuser with 3rd - E GUYS INC. | Audi B8.5 A5 S-Line / S5 KB Style Carbon Fiber Rear Diffuser with 3rd - E GUYS INC. | Audi B8.5 A5 S-Line / S5 KB Style Carbon Fiber Rear Diffuser with 3rd - E GUYS INC. | Audi B8.5 A5 S-Line / S5 KB Style Carbon Fiber Rear Diffuser with 3rd - E GUYS INC. | Audi B8.5 A5 S-Line / S5 KB Style Carbon Fiber Rear Diffuser with 3rd - E GUYS INC. | Audi B8.5 A5 S-Line / S5 KB Style Carbon Fiber Rear Diffuser with 3rd - E GUYS INC. | Audi B8.5 A5 S-Line / S5 KB Style Carbon Fiber Rear Diffuser with 3rd - E GUYS INC. | Audi B8.5 A5 S-Line / S5 KB Style Carbon Fiber Rear Diffuser with 3rd - E GUYS INC. | Audi B8.5 A5 S-Line / S5 KB Style Carbon Fiber Rear Diffuser with 3rd - E GUYS INC. | Audi B8.5 A5 S-Line / S5 KB Style Carbon Fiber Rear Diffuser with 3rd - E GUYS INC. | Audi B8.5 A5 S-Line / S5 KB Style Carbon Fiber Rear Diffuser with 3rd - E GUYS INC. | Audi B8.5 A5 S-Line / S5 KB Style Carbon Fiber Rear Diffuser with 3rd - E GUYS INC. | Audi B8.5 A5 S-Line / S5 KB Style Carbon Fiber Rear Diffuser with 3rd - E GUYS INC. | Audi B8.5 A5 S-Line / S5 KB Style Carbon Fiber Rear Diffuser with 3rd - E GUYS INC. | Audi B8.5 A5 S-Line / S5 KB Style Carbon Fiber Rear Diffuser with 3rd - E GUYS INC. | Audi B8.5 A5 S-Line / S5 KB Style Carbon Fiber Rear Diffuser with 3rd - E GUYS INC. | Audi B8.5 A5 S-Line / S5 KB Style Carbon Fiber Rear Diffuser with 3rd - E GUYS INC. | Audi B8.5 A5 S-Line / S5 KB Style Carbon Fiber Rear Diffuser with 3rd - E GUYS INC. | Audi B8.5 A5 S-Line / S5 KB Style Carbon Fiber Rear Diffuser with 3rd - E GUYS INC. | Audi B8.5 A5 S-Line / S5 KB Style Carbon Fiber Rear Diffuser with 3rd - E GUYS INC. | Audi B8.5 A5 S-Line / S5 KB Style Carbon Fiber Rear Diffuser with 3rd - E GUYS INC. | Audi B8.5 A5 S-Line / S5 KB Style Carbon Fiber Rear Diffuser with 3rd - E GUYS INC. | Audi B8.5 A5 S-Line / S5 KB Style Carbon Fiber Rear Diffuser with 3rd - E GUYS INC. | Audi B8.5 A5 S-Line / S5 KB Style Carbon Fiber Rear Diffuser with 3rd - E GUYS INC. | Audi B8.5 A5 S-Line / S5 KB Style Carbon Fiber Rear Diffuser with 3rd - E GUYS INC. | Audi B8.5 A5 S-Line / S5 KB Style Carbon Fiber Rear Diffuser with 3rd - E GUYS INC. | Audi B8.5 A5 S-Line / S5 KB Style Carbon Fiber Rear Diffuser with 3rd - E GUYS INC.

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    • Home
    • Audi Shop All Carbon
    • Audi B8.5 A5 S-Line / S5 KB Style Carbon Fiber Rear Diffuser with 3rd Brake Light (2013–2017)
    Audi B8.5 A5 S-Line / S5 KB Style Carbon Fiber Rear Diffuser with 3rd Brake Light (2013–2017)
    Audi B8.5 A5 S-Line / S5 KB Style Carbon Fiber Rear Diffuser with 3rd Brake Light (2013–2017)
    Audi B8.5 A5 S-Line / S5 KB Style Carbon Fiber Rear Diffuser with 3rd Brake Light (2013–2017)
    Audi B8.5 A5 S-Line / S5 KB Style Carbon Fiber Rear Diffuser with 3rd Brake Light (2013–2017)
    Audi B8.5 A5 S-Line / S5 KB Style Carbon Fiber Rear Diffuser with 3rd Brake Light (2013–2017)
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    Audi B8.5 A5 S-Line / S5 KB Style Carbon Fiber Rear Diffuser with 3rd Brake Light (2013–2017)

    $949.99
    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 B8.5 A5/S5/RS5 Carbon Fiber Vented Hood
    Audi B8.5 A5/S5/RS5 Carbon Fiber Vented Hood
    $1,999.99 - $2,399.99
    Audi B8.5 A5 S-Line / S5 KB Style Carbon Fiber Rear Diffuser with 3rd Brake Light (2013–2017)
    Description

    Upgrade the rear aesthetics of your Audi B8.5 A5 S-Line or S5 with our KB Style Carbon Fiber Rear Diffuser, featuring an integrated 3rd brake light. Designed to bring aggressive, track-inspired styling to your Audi, this diffuser not only enhances the visual appeal but also improves airflow dynamics at the rear. Constructed from premium-grade carbon fiber and finished in a high-gloss UV-resistant clear coat, this diffuser is the ideal addition for Audi enthusiasts looking for a bold, high-end look.

    Key Features:

    • KB Style Design: Delivers a sharp, race-inspired appearance that dramatically enhances the rear end of your vehicle.

    • Premium Carbon Fiber Construction: Crafted from authentic carbon fiber for strength, lightness, and durability, with a gloss clear coat finish for a deep shine.

    • Integrated 3rd Brake Light: Enhances visibility while adding a unique and aggressive visual element.

    • OEM Fitment: Direct bolt-on design that aligns with factory mounting points—no cutting or major modifications required.

    • Functional Aerodynamics: Helps smooth rear airflow and adds a subtle performance touch to your build.

    Fitment:

    • Audi B8.5 S5 Coupe & Cabriolet (V6T models): 2013–2017

    • Audi B8.5 A5 S-Line Coupe & Cabriolet: 2013–2017
      Compatible only with S-Line and S5 rear bumpers (will not fit standard A5 models without S-Line trim).

    Specifications:

    • Material: 100% Real Carbon Fiber

    • Finish: Gloss UV-Resistant Clear Coat

    • Style: KB Style Diffuser with Central Brake Light Integration

    Package Includes:

    • 1x KB Style Carbon Fiber Rear Diffuser

    • 1x Integrated 3rd Brake Light

    Installation Notes:
    Professional installation is highly recommended. Some wiring may be necessary to connect the 3rd brake light to your existing harness.

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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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