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  • QUALITY CRAFTSMANSHIP
  • 30 Day Return Policy
  • E-mail & DM Support
Excellent55 Reviews on

2018-23 S550 Mustang Roush Rear Valance Aero Foil

$209.99 $164.99
You Save $45.00
5 Left In Stock

High-Performance Aero Mod for Your Mustang

  • Custom design enhances Mustang's contours for an exotic & eye-catching look
  • USA-made, Valance ensures durability & perfect fit
  • Pre-drilled holes & included screws allow for secure, simple installation
  • Custom design enhances Mustang's contours for an exotic & eye-catching look
  • USA-made, Valance ensures durability & perfect fit
  • Pre-drilled holes & included screws allow for secure, simple installation
DESCRIPTION
 

Designed utilizing techniques used in racing to improve aerodynamic efficiencies, ROUSH Rear Valance Air Foils work to separate the airflow beneath the car, allowing a smaller portion to follow the under-body contours, adjusting rear downforce. Couple these foils with the ROUSH Lower High-Flow Opening (P/N 422081) and 3-Piece Chin Spoiler and Wheel Shroud Kit (P/N 422082) for the complete lower aero package!

Each piece is made from high-strength TPO (thermal plastic olefin) with a black stipple finish, for an OEM look and lasting durability. The plastic is molded with high-pressure injection, the same process used by OE automotive manufactures, which allows for impact resistance and durable flexibility, while remaining lightweight with low density. Easy installation means no trimming painting is required (drilling for mounting is required). All required parts are included, such as hardware, templates, and detailed instructions.

FEATURES
 
  • Fits 18, 19, 20, 21, 22, and 23 Mustang GT - will NOT fit EcoBoost, GT350 or GT500
  • Add to the factory rear valance for an aggressive look inspired by racing
  • Made from injection-molded TPO (Thermoplastic Poly Olefin) with a black stipple finish
  • Offers OEM look, long-lasting durability, and flexibility
  • Lightweight and impact resistant
  • Designed with OEM CAD data to ensure precise fit
  • Includes all required hardware, templates, and instructions
  • Minor modification to rear valance for mounting is required
  • Estimated installation time - 1 hour
  • 90-Day ROUSH Limited Parts Warranty
SHIPPING INFORMATION
 

FREE SHIPPING on standard orders over $49 within the continental United States. We utilize USPS, UPS, and DHL for
shipping services. For shipping addresses within 48 contiguous United States, next-day shipping on most parts if you place your order by 5 PM CST. UPS does
not deliver to P.O. boxes, so we recommend a physical address. Non-returnable custom orders may take up to 10 days to ship.

Most parts ship the next business day unless they are out of stock or are custom orders. In the continental U.S., standard
ground delivery takes approximately 3-5 business days. We offer 3-day, 2-day, or 1-day shipping options for faster delivery, shipped the next business day if ordered by 5 PM CST. Custom orders can take up to 10 days or more to ship. For APO/FPO addresses, shipping can take up to 2 months via USPS.

“Thank you so much for your great customer service! Your products are of great quality and I get so many compliments!”

William Windsor

MAKE YOUR MUSTANG EVEN MIGHTIER

Boost your Mustang’s flow and style with a high-quality Roush Rear Valance that couldn’t be easier to install

Track Inspired Styling

This Roush Rear Valance Aero Foil Kit is a great way to set your 2018-2023 GT Mustang apart from all the rest.

Roush Quality

Made in the USA from high-strength TPO meant to last long and stay looking good making it a great bang for your buck part.

Easy Screw-In Installation

Unlike others, this Rear Valance has pre-drilled holes for secure attachment to your stock diffuser making it a quick and easy install that should take you about an hour tops.

WHAT’S IN THE BOX

We aim to make installing your new parts as quick and easy as possible. As well as your mod parts, we give you all the info you need for an efficient installation. Here’s what you get:

  • (1) Driver Side Rear Diffuser
  • (1) Passenger Side Rear Diffuser
  • (2) Brackets
  • (6) Self-Tapping Screws
  • (4) Bolts
  • Double-Sided Tape
  • Installation Guide Download. Click here to download pdf.

OUR CUSTOMERS LOVE THEIR EMP MODS

Excellent55 Reviews on

Emailed and explained what I needed and they knew right away what part I needed and sent it in.

Lorenzo M.
Verified buyer

Aggressive look. This rear diffuser will give such an aggressive and unique look to your Mustang. I love it.

Eva U.
Verified buyer

I’ve purchased 5 different rocker splitters. This is the best one, by far. Functional & made of metal. Quality product & durable.

JONATHAN K.
Verified buyer

All the parts I’ve ordered from EMP are 11/10 quality not to mention the customer service is impeccable. The diffuser is perfect fits the car great...12/10 experience

Kenneth N.
Verified buyer

HOW TO INSTALL YOUR ROUSH VALANCE

Click here to download pdf of Installation Guide. PLEASE READ FOR LATEST INSTRUCTION ADDITIONS THAT MAY NOT BE SHOWN IN VIDEO.

FREQUENTLY ASKED QUESTIONS

What is Evans Motorsport Performance?
 

Evans Motorsport Performance, is founded, owned, and operated by father and son Travis and Cole Evans. We're dedicated to crafting car mods that outclass and outlast, all with a seamless installation. Quality isn't just our reputation; it's our promise. Your ride deserves excellence, and we deliver.

Where do you make your mods?
 

We build each EMP part at our Houston, Texas hub - no distant factories in faraway lands here. Our mission? Delivering peak-quality, American-made car mods you can install with pride and confidence. 

How do I get my mods?
 

Revamping your muscle car is easy with us. Select your vehicle, and pick the custom mods you want. We can source them from over 1,500 quality suppliers if you need help finding them. Finally, sit back and let us speed-ship your order, free for $49+ buys.

My part doesn’t fit. Can I get all my money back?
 

We’ll refund your money, less any merchant or restocking fees we incurred which we’re unfortunately unable to refund.

What's your shipping policy?
 

We offer FREE SHIPPING on standard orders over $49 within the continental United States. We utilize USPS, UPS, and DHL for shipping services. For shipping addresses within 48 contiguous United States, we offer Next-day shipping on most parts if you place your order by 5 PM CST. UPS does not deliver to P.O. boxes, so we recommend a physical address. Custom orders, which are non-returnable, may take up to 10 days to ship.

How long until I get my mods?
 

Most parts ship the next business day, unless they're out of stock or are custom orders. If you're in the continental U.S., standard ground delivery takes approximately 3-5 business days. We offer 3-day, 2-day, or 1-day shipping options for faster delivery, which are shipped out the next business day if ordered by 5 PM CST. Custom orders can take up to 10 days or more to ship. For APO/FPO addresses, shipping can take up to 2 months via USPS.

Excellent55 Reviews on

2018-23 S550 Mustang Roush Rear Valance Aero Foil

$209.99 $164.99
You Save $45.00
5 Left In Stock

High-Performance Aero Mod for Your Mustang

  • Custom design enhances Mustang's contours for an exotic & eye-catching look
  • USA-made, Valance ensures durability & perfect fit
  • Pre-drilled holes & included screws allow for secure, simple installation

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Free Shipping
QUALITY CRAFTSMANSHIP
30 Day Return Policy
E-mail & DM Support
  • Free Shipping
  • QUALITY CRAFTSMANSHIP
  • 30 Day Return Policy
  • E-mail & DM Support