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Exterior Components› Body Panels and Components

Maxton Design

Street Pro Rear Diffuser

Name: Street Pro Rear Diffuser
Brand: Maxton Design
SKU: AUA4B8FCNC-RS1B

$378.99 $303.99 Save $75.00

SKU: AUA4B8FCNC-RS1B

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$100 Minimum Order

Non-Returnable Item

DIY PRO SHOP

Moderate — 2–4 hours

Overview

The Maxton Design Street Pro Rear Diffuser is a body panel component designed for the Audi A4 B8 Facelift. It is constructed from durable ABS plastic, similar to materials used in OEM parts, offering impact and scratch resistance.

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The Maxton Design Street Pro Rear Diffuser is engineered to provide a visual upgrade and aerodynamic improvement for the Audi A4 B8 Facelift models. The 10 mm thick ABS plastic construction ensures longevity and resilience against various weather conditions and temperature extremes. Designed using 3D laser scanning for precise fitment, the Street Pro Rear Diffuser aims to increase downforce, thereby improving the car's aerodynamic performance. It features a stylish edge finish and comes with a mounting kit and manual for installation. The product is secured with protective foil and is ready to install without the need for painting; however, if painting is desired, a primer must be applied first. Each part is labeled to confirm authenticity and quality. Installation is highly recommended to be performed by professional auto body shops experienced in visual modification installations. This rear diffuser is specifically designed for the Audi A4 B8 (2009-2016) models, including variants with the 3.2L V6 engine, the 2.0T FWD, and the 2.0T Quattro engines. An optional matte black with red core finish is available in addition to the standard matte black.

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

Brand	Maxton Design
Part Number	AUA4B8FCNC-RS1B
Category	Exterior 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.

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