Name: Roush 2018-2023 Ford Mustang Rear Valance Aero Foil Kit
Brand: Roush
SKU: 422085
Price: 139.99 USD
Availability: InStock

Roush

$ 139.99

In stock, ready to ship
Backordered, shipping soon

Orders Over $750 Ship Free!

Genuine Roush Performance for Your Mustang

Ready to race, or just show off the performance capabilities of the 2018-2023 Mustang? Add Roush Rear Valance Aero Foil Kit, designed to work with the factory quad-tip GT valance! 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. 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.

Key Specs

Genuine Roush Performance part, factory part number 422085
Fits 2018-2023 Ford Mustang (5.0L)
Category: Body
Roush estimated install time: 1 hour
Shipping weight: 3.0 lb

Fitment

2018 Ford Mustang 5.0L
2019 Ford Mustang 5.0L
2020 Ford Mustang 5.0L
2021 Ford Mustang 5.0L
2022 Ford Mustang 5.0L
2023 Ford Mustang 5.0L

Common Questions

Is this a genuine Roush part?

Yes. This is a factory Roush Performance part, number 422085, sourced directly through our Roush dealer account.

How long does the install take?

Roush rates this install at 1 hour. Our shop can handle it at Bessemer or Pell City, or we ship it to your door.

Will it fit my truck or car?

This part fits the 2018-2023 Ford Mustang with the 5.0L. Not sure about your exact build? Call us at (205) 491-0010 before you order and we will confirm fitment.

Why Buy From TCcustoms

TCcustoms is the number one Roush supercharger dealer in the world, with full installation shops at both of our Alabama locations, Bessemer and Pell City. Every part we sell is a genuine Roush Performance part with a factory part number. We install what we sell, we ship nationwide, and customers bring vehicles to us from all over the country. Call us at (205) 491-0010 and a real builder will help you spec it right.

Advertised price is Roush MAP. Genuine Roush Performance, made for your Ford.

[{"id":45677508329551,"title":"Default Title","option1":"Default Title","option2":null,"option3":null,"sku":"422085","requires_shipping":true,"taxable":true,"featured_image":{"id":43713871249487,"product_id":8862684643407,"position":1,"created_at":"2026-06-11T17:43:27-05:00","updated_at":"2026-06-11T17:43:29-05:00","alt":null,"width":385,"height":270,"src":"\/\/www.tccustoms.com\/cdn\/shop\/files\/422085-1-555x389.jpg?v=1781217809","variant_ids":[45677508329551]},"available":true,"name":"Roush 2018-2023 Ford Mustang Rear Valance Aero Foil Kit","public_title":null,"options":["Default Title"],"price":13999,"weight":3,"compare_at_price":null,"inventory_quantity":0,"inventory_management":"shopify","inventory_policy":"continue","barcode":"844764006881","featured_media":{"alt":null,"id":35269988646991,"position":1,"preview_image":{"aspect_ratio":1.426,"height":270,"width":385,"src":"\/\/www.tccustoms.com\/cdn\/shop\/files\/422085-1-555x389.jpg?v=1781217809"}},"requires_selling_plan":false,"selling_plan_allocations":[],"quantity_rule":{"min":1,"max":null,"increment":1}}]

{"id":45677508329551,"title":"Default Title","option1":"Default Title","option2":null,"option3":null,"sku":"422085","requires_shipping":true,"taxable":true,"featured_image":{"id":43713871249487,"product_id":8862684643407,"position":1,"created_at":"2026-06-11T17:43:27-05:00","updated_at":"2026-06-11T17:43:29-05:00","alt":null,"width":385,"height":270,"src":"\/\/www.tccustoms.com\/cdn\/shop\/files\/422085-1-555x389.jpg?v=1781217809","variant_ids":[45677508329551]},"available":true,"name":"Roush 2018-2023 Ford Mustang Rear Valance Aero Foil Kit","public_title":null,"options":["Default Title"],"price":13999,"weight":3,"compare_at_price":null,"inventory_quantity":0,"inventory_management":"shopify","inventory_policy":"continue","barcode":"844764006881","featured_media":{"alt":null,"id":35269988646991,"position":1,"preview_image":{"aspect_ratio":1.426,"height":270,"width":385,"src":"\/\/www.tccustoms.com\/cdn\/shop\/files\/422085-1-555x389.jpg?v=1781217809"}},"requires_selling_plan":false,"selling_plan_allocations":[],"quantity_rule":{"min":1,"max":null,"increment":1}}

Hear it from them

★★★★★
Chesley and Gaige were a pleasure to work with. They are extremely friendly and answered all my questions. Extremely satisfied with the product and customer service
Hunter W.

★★★★★
Five stars!!! Only because there is not a six star option. Chesley and his team at TCcustoms did an unbelievable job on my recent Raptor upgrade! Can’t recommend them enough.
Brad T.

★★★★★
Casey and his crew always Ready to serve the customers, myself, and the Community. Thanks TC Customs for the Exceptional add ons to my F-150!
Jeff W.

★★★★★
I was looking for a part that is pretty difficult to find for my new f150. I live a state over and watch TC on YouTube. I called and Casey answered the phone and made a miracle happen the next day. Thanks for taking care of me!
Freddy N.

★★★★★
Casey was awesome helped me pick out the the right bed cover for my new 2024 F150. Casey also to the time to tell about all the features and to discuss some of the other features from TCcustoms that would work on my truck.
Scott T.