Exterior Components› Body Panels and Components

CT Carbon

Carbon Rear Diffuser

$1,389.00

SKU: CT5135

In Stock
In Stock
Ships by Sep 9
Free Shipping over $200
$100 Minimum Order
30 Days Return
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Overview

The CT Carbon diffuser is a rear aerodynamic enhancement for the Audi RS4 B9.5, designed by CT Design. This diffuser is compatible with the 2016-2024 Audi RS4 B9 models.
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The CT Carbon diffuser, designed by CT Design, offers an aerodynamic upgrade for the Audi RS4 B9 and B9.5 models. Its high-gloss finish provides a sleek, aggressive look that complements the vehicle's aesthetics. This diffuser is specifically designed to fit Audi RS4 B9 models from 2016 to 2024. The use of pre-preg carbon fibre ensures a lightweight yet robust construction, contributing to the vehicle's performance and visual appeal. The in-house design by CT Carbon highlights a commitment to automotive styling and functionality. CT Carbon provides a 24-month warranty on this product for purchases made after November 13, 2023. The company also offers various fitting options, including booking at their Hertfordshire, UK facility, finding a local fitting partner, or self-installation using provided guides. Free UK mainland delivery is standard for all orders, with worldwide delivery also available.

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

BrandCT Carbon
Part NumberCT5135
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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