Product images and videos 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.

Exterior Components› Body Panels and Components

RTR

Rear Diffuser

Name: Rear Diffuser
Brand: RTR
SKU: 387381

$299.99

SKU: 387381

Free Shipping over $200

$100 Minimum Order

Non-Returnable Item

DIY PRO SHOP

Easy — 1–2 hours

Overview

The RTR Rear Diffuser is a modern, aggressive styling accessory designed for the 2015-2017 Ford Mustang GT and EcoBoost models. It is constructed from high-pressure injection molded TPO material for durability and features a grained texture for an OEM look and to help conceal impacts.

Show original supplier description

The RTR Rear Diffuser brings Vaughn Gittin Jr.'s signature modern, aggressive styling to your 2015-2017 Ford Mustang GT or EcoBoost. Crafted from OEM-quality, high-pressure injection-molded TPO material, it offers long-lasting durability and features a grained texture for a factory look that helps hide daily driving scuffs and impacts. Installation is described as straightforward, though it does require permanent modification to the stock rear bumper cover to remove the factory diffuser. The process can typically be completed in approximately two hours and requires light to moderate mechanical skill. This unit is compatible with Mustangs that are equipped with or without factory-installed backup sensors, ensuring full functionality of these features. It is crucial to note that this RTR Rear Diffuser is specifically designed for 2015-2017 GT and EcoBoost Mustangs equipped with the factory Premium Chassis Packages only, specifically Trim Levels: 200A/201A/400A/401A. It will not fit base V6 models or Mustangs with the Performance Package. Please refer to comparison images if unsure about your bumper style.

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

Fitment Guaranteed

Don’t gamble
on fit.

Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

Available on iOS & Android

Specifications

Brand	RTR
Part Number	387381
Category	Exterior Components

5,000+ Trusted brands

1M+ Enthusiasts

5M+ Parts sold

(760) 282-4645 hello@motormia.co

Buy with Confidence

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.

View Full Return Policy

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.

View Full Shipping Policy