CMST Carbon Fiber Rear Diffuser for Audi A4 S-Line / S4 B9 2017-2019
CMST Carbon Fiber Rear Diffuser for Audi A4 S-Line / S4 B9 2017-2019
CMST Carbon Fiber Rear Diffuser for Audi A4 S-Line / S4 B9 2017-2019
CMST Carbon Fiber Rear Diffuser for Audi A4 S-Line / S4 B9 2017-2019
CMST Carbon Fiber Rear Diffuser for Audi A4 S-Line / S4 B9 2017-2019
CMST Carbon Fiber Rear Diffuser for Audi A4 S-Line / S4 B9 2017-2019
CMST Carbon Fiber Rear Diffuser for Audi A4 S-Line / S4 B9 2017-2019
CMST Carbon Fiber Rear Diffuser for Audi A4 S-Line / S4 B9 2017-2019
CMST Carbon Fiber Rear Diffuser for Audi A4 S-Line / S4 B9 2017-2019
CMST Carbon Fiber Rear Diffuser for Audi A4 S-Line / S4 B9 2017-2019
CMST Carbon Fiber Rear Diffuser for Audi A4 S-Line / S4 B9 2017-2019
CMST Carbon Fiber Rear Diffuser for Audi A4 S-Line / S4 B9 2017-2019
CMST Carbon Fiber Rear Diffuser for Audi A4 S-Line / S4 B9 2017-2019
CMST Carbon Fiber Rear Diffuser for Audi A4 S-Line / S4 B9 2017-2019
CMST Carbon Fiber Rear Diffuser for Audi A4 S-Line / S4 B9 2017-2019
CMST Carbon Fiber Rear Diffuser for Audi A4 S-Line / S4 B9 2017-2019
CMST Carbon Fiber Rear Diffuser for Audi A4 S-Line / S4 B9 2017-2019
CMST Carbon Fiber Rear Diffuser for Audi A4 S-Line / S4 B9 2017-2019
CMST Carbon Fiber Rear Diffuser for Audi A4 S-Line / S4 B9 2017-2019
CMST Carbon Fiber Rear Diffuser for Audi A4 S-Line / S4 B9 2017-2019
CMST Carbon Fiber Rear Diffuser for Audi A4 S-Line / S4 B9 2017-2019
CMST Carbon Fiber Rear Diffuser for Audi A4 S-Line / S4 B9 2017-2019

CMST Carbon Fiber Rear Diffuser for Audi A4 S-Line / S4 B9 2017-2019
Elevate the aggressive stance and aerodynamic performance of your Audi with the CMST Carbon Fiber Rear Diffuser....
Vendor: CMST
Availability: In stock
Product type: Rear Diffuser
$2,375.00
$2,375.00
Please hurry! Only 1000 left in stock
Subtotal: $2,375.00
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CMST Carbon Fiber Rear Diffuser for Audi A4 S-Line / S4 B9 2017-2019

CMST Carbon Fiber Rear Diffuser for Audi A4 S-Line / S4 B9 2017-2019

Description
Description
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Elevate the aggressive stance and aerodynamic performance of your Audi with the CMST Carbon Fiber Rear Diffuser. Designed specifically for the Audi A4 S-Line and S4 B9 models from 2017 to 2019, this premium component replaces the factory rear valance, adding significant visual depth and a motorsport-inspired aesthetic. Crafted by CMST, it is a direct-fit upgrade that perfectly complements the vehicle's lines while enhancing its rear-end presence.

This diffuser is meticulously constructed from authentic, high-grade carbon fiber, ensuring a perfect balance of lightweight strength and premium appearance. It is finished with a durable UV-protection clearcoat to guard against fading and environmental damage, preserving its deep luster and weave definition for years. The standard offering features the classic 3k (2x2) woven pattern with a high-gloss finish, capturing light beautifully and showcasing the quality of the carbon material.

  • Precision Fitment: Direct replacement for the Audi A4 S-Line / S4 B9 (2017-2019).
  • Premium Material: Manufactured from real carbon fiber for authentic looks and reduced weight.
  • Finish Options: Standard 3k Gloss finish. Forged carbon pattern or a Matte clearcoat finish are available at an additional cost.
  • Installation: Direct bolt-on design for a seamless, OEM+ integration.

All CMST carbon fiber parts are covered by our commitment to quality, ensuring you receive a premium, fitment-guaranteed product for your Audi.

Additional Information
Additional Information
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Shipping & Return
Shipping & Return
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Returns Policy

You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).

You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).

If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.

Shipping

We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.

When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.

Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.

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