Exterior Components› Body Panels and Components

Renntech

CLS63 AMG C218 Rear Diffuser

$3,460.00

SKU: 88.218.20.80

In Stock
In Stock
Ships by Sep 12
Free Shipping over $200
$100 Minimum Order
30 Days Return
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Overview

The Renntech rear diffuser is a pre-preg carbon fiber aerodynamic component designed for the Mercedes-Benz C218 CLS63 AMG. This lightweight upgrade helps decrease vehicle drag and increases rear downforce by smoothing underbody airflow at speed.
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The Renntech rear diffuser is a precision-engineered aerodynamic component specifically designed for the 2011-2014 Mercedes-Benz C218 CLS63 AMG. By optimizing underbody airflow and providing a smooth transition to ambient air, this diffuser functions to decrease drag and increase rear downforce at speed. It serves as a visual and functional companion to the Renntech 3-piece carbon front splitter and is compatible with OEM exhaust tips. The installation process is quick and easy, requiring no modifications to the vehicle's rear bumper. Renntech handcrafts these components in-house, ensuring each piece meets rigorous quality standards, though minor weave or finish variations inherent to the pre-preg process may occur.

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

BrandRenntech
Part Number88.218.20.80
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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