2024-2025
2015-2023
2010-2014
2005-2009
1999-2004
1994-1998
1979-1993
Installation Time
(approx) 1 Hour
Difficulty Level:
Simple installation for anyone.
Installation Guides
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Find Rear Diffusers & Valances for your Mustang
Roush Rear Valance Aero Foil Kit (18-23 Mustang GT; 19-23 Mustang EcoBoost w/ Active Exhaust)Find parts that fit my vehicle
Item 404870
$0.00
65 Reviews
8 Answers
Our Price
$139.99 pair
Ship to: 43215
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Frequently Bought Together
Product Information
Features, Description, Reviews, Q&A, Specs & Installation
Features
- Aggressive Track Inspired Styling
- Increases Rear Downforce
- Injection Molded TPO Construction
- Black Stipple OEM Style Finish
- Simple Installation - Minor Drilling Required
- Fits 2018-2023 GT Mustang and 2019-2023 EcoBoost Mustangs with Active Exhaust and Factory Quad Tips
Description
Track Inspired Styling. Add aggressive track inspired styling to your 2018-2023 GT Mustang by installing a Roush Rear Valance Aero Foil Kit. This Rear Valance Aero Foil attaches to your GT's rear diffuser to considerably alter the overall appearance of your Mustang's rear end. This Roush Rear Valance Aero Foil Kit is a great way to set your 2018-2023 GT Mustang apart from all the rest.
Functional. Roush designed their Rear Valance Aero Foil Kit employing techniques used in professional racing. This Rear Valance Aero Foil will improve your 2018-2023 Mustang's aerodynamics by separating airflow beneath the car, allowing a smaller portion to follow the under-body contours, increasing rear downforce.
Roush Quality. Roush manufactures their Rear Valance Aero Foil Kit in the USA at their own plastics manufacturing facility from OEM quality high pressure injection molded high-strength thermal plastic olefin (TPO) using the original OEM CAD data from Ford to ensure a perfect fit. TPO is an extremely strong material known for its light-weight, superior durability and impact resistance - making it perfect to withstand the hazards of daily driven vehicles. The Grille is then completed in a black, stipple textured finish for aggressive good looks.
Simple Install - Drilling Required. Roush designed their Roush Rear Valance to install utilizing both double sided automotive tape and mechanical fasteners, so drilling will be required for installation. Roush provides the required mounting hardware and installation instructions. Installation should take about an hour to complete.
Recommended Upgrade. Complete your 2018-2023 Mustang's aggressive track inspired appearance by installing Roush's High-Flow Lower Grille Opening Kit (part# 422081) and 3-Piece Aero Chin Spoiler (part# 422082) - sold separately.
Application. This Roush Rear Valance Aero Foil Kit is designed to fit 2018-2023 GT Mustang and 2019-2023 EcoBoost Models with the Active Exhaust and factory quad tips only. Does not fit V6 or Shelby GT350.
Functional. Roush designed their Rear Valance Aero Foil Kit employing techniques used in professional racing. This Rear Valance Aero Foil will improve your 2018-2023 Mustang's aerodynamics by separating airflow beneath the car, allowing a smaller portion to follow the under-body contours, increasing rear downforce.
Roush Quality. Roush manufactures their Rear Valance Aero Foil Kit in the USA at their own plastics manufacturing facility from OEM quality high pressure injection molded high-strength thermal plastic olefin (TPO) using the original OEM CAD data from Ford to ensure a perfect fit. TPO is an extremely strong material known for its light-weight, superior durability and impact resistance - making it perfect to withstand the hazards of daily driven vehicles. The Grille is then completed in a black, stipple textured finish for aggressive good looks.
Simple Install - Drilling Required. Roush designed their Roush Rear Valance to install utilizing both double sided automotive tape and mechanical fasteners, so drilling will be required for installation. Roush provides the required mounting hardware and installation instructions. Installation should take about an hour to complete.
Recommended Upgrade. Complete your 2018-2023 Mustang's aggressive track inspired appearance by installing Roush's High-Flow Lower Grille Opening Kit (part# 422081) and 3-Piece Aero Chin Spoiler (part# 422082) - sold separately.
Application. This Roush Rear Valance Aero Foil Kit is designed to fit 2018-2023 GT Mustang and 2019-2023 EcoBoost Models with the Active Exhaust and factory quad tips only. Does not fit V6 or Shelby GT350.
Fitment:
- 2018 Ford Mustang
- 2019 Ford Mustang
- 2020 Ford Mustang
- 2021 Ford Mustang
- 2022 Ford Mustang
- 2023 Ford Mustang
Roush 422085
CA Residents: 
WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov
Installation & What's in the Box
Installation Info
What's in the Box
- (1) Driver Side Rear Diffuser
- (1) Passenger Side Rear Diffuser
- (2) Brackets
- (6) Self-Tapping Screws
- (4) Bolts
- Double-Sided Tape
- Instructions
4.9
Customer Reviews (65)
Questions & Answers (8)
Will It Fit My Mustang
- EcoBoost - 19, 20, 21, 22, 23
- GT - 18, 19, 20, 21, 22, 23
