Exterior Components› Body Panels and Components

Maxton Design

Street Pro Rear Diffuser

$303.99

SKU: AUA4B9FCNC-RS1B

In Stock
In Stock
Ships by Sep 12
Free Shipping over $200
$100 Minimum Order
30 Days Return
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Overview

The Maxton Design Street Pro Rear Diffuser is a body panel component designed to enhance the aerodynamics of your Audi A4 B9 Facelift. Crafted from durable ABS plastic, this diffuser increases downforce and provides a sharper visual aesthetic. It features a UV protective coating and is 10 mm thick for added resilience.
Show original supplier description
The Maxton Design Street Pro Rear Diffuser is engineered to provide both visual enhancement and aerodynamic improvements for the Audi A4 B9 Facelift. By increasing downforce, this component contributes to the vehicle's overall performance and stability. The 10 mm thickness further enhances its robustness, ensuring it can withstand the rigors of daily driving. It also features a UV protective coating, making it resilient to weather elements and temperature fluctuations, preventing corrosion and maintaining its appearance over time. The product comes secured with protective foil and does not require painting, offering a straightforward upgrade. Maxton Design ensures perfect fitment through 3D laser scanning of each vehicle model. This rear diffuser is designed specifically for the Audi A4 B9.5 (2020-2025) models equipped with either the 2.0T FWD or 2.0T Quattro drivetrains. Installation is recommended to be performed by professional auto body shops experienced in visual modifications to ensure optimal results. This rear diffuser is available in a matte black finish, with an option for a matte black finish with a red core. The product includes a mounting kit and a mounting manual to aid in installation.

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

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Specifications

BrandMaxton Design
Part NumberAUA4B9FCNC-RS1B
CategoryExterior Components

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Returns & Fitment

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

Free shipping over $200 in the continental US. Alaska, Hawaii, U.S. territories (Puerto Rico, U.S. Virgin Islands, Guam, American Samoa, and the Northern Mariana Islands), and international orders carry surcharges — most appear at checkout. Some exceptions (LTL freight, or suppliers who quote freight only after we place the order) won’t. In those cases we’ll reach out with the exact charge before your order moves forward.

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