Roush Rear Valance Aero Foil Kit — Fits 2018-2023 Ford Mustang GT (Excl. EcoBoost/GT350)

SKU: RSH422085
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Sale price$139.99
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Car Wheel Size Chart

Wheel Diameter (inches) Tire Width (mm) Aspect Ratio Rim Width (inches)
14185655.5
15195606.0
16205556.5
17215507.0
18225457.5
19235408.0
20245358.5

Note: Wheel and tire sizes vary by car make and model. Always consult your vehicle’s manufacturer for exact specifications.

How to Read Tire Size

Example: 225/45R17 means:

  • 225 = Tire width in mm
  • 45 = Aspect ratio (height as % of width)
  • R17 = Rim diameter in inches

Product Details

Product Description
Part Numbers
Sizing & Fit

About Roush

Roush engineers high-quality automotive parts and accessories trusted by enthusiasts and shops across North America. At GGCRACING we stock the full Roush lineup with fast shipping and expert fitment support — order with confidence.

Watch in action

Roush Rear Valance Aero Foil Kit for 2018-2023 Ford Mustang GT

Prepare your 2018-2023 Ford Mustang GT for the track or simply elevate its aggressive aesthetic with the Roush Rear Valance Aero Foil Kit. Designed to integrate seamlessly with the factory quad-tip GT valance, this kit is engineered using advanced racing techniques to improve aerodynamic efficiencies. The aero foils strategically separate airflow beneath the car, allowing a smaller portion to follow the under-body contours, which precisely adjusts rear downforce for enhanced stability and performance.

Performance-Driven Design & Durability

  • Optimized Aerodynamics: Separates under-car airflow to fine-tune rear downforce.
  • Aggressive Styling: Adds a race-ready look to your Mustang's rear valance.
  • Seamless Integration: Designed to work perfectly with the factory quad-tip GT valance.
  • High-Strength Construction: Made from durable TPO (thermal plastic olefin) with a black stipple finish for an OEM appearance and long-lasting resilience.
  • Impact Resistant: High-pressure injection molding ensures robust impact resistance and flexible durability, while maintaining a lightweight, low-density profile.
  • Vehicle Compatibility: Fits 2018-2023 Ford Mustang GT, GT Premium, Bullitt, Mach 1, and Shelby GT500 models (excluding EcoBoost and Shelby GT350).

Whether you're hitting the track or cruising the streets, the Roush Rear Valance Aero Foil Kit provides a significant upgrade in both form and function. Get yours today at GGCRACING and experience the difference.

Vehicle Fitment

Years Make Model Trim
2018-2020 Ford Mustang Shelby GT350
2018-2023 Ford Mustang EcoBoost
2018-2023 Ford Mustang EcoBoost Premium
2018-2023 Ford Mustang GT
2018-2023 Ford Mustang GT Premium
2019-2020 Ford Mustang Bullitt
2020-2022 Ford Mustang Shelby GT500
2021-2023 Ford Mustang Mach 1

Product Details

Product Description
Part Numbers
Sizing & Fit

About Roush

Roush engineers high-quality automotive parts and accessories trusted by enthusiasts and shops across North America. At GGCRACING we stock the full Roush lineup with fast shipping and expert fitment support — order with confidence.

Watch in action

Roush Rear Valance Aero Foil Kit for 2018-2023 Ford Mustang GT

Prepare your 2018-2023 Ford Mustang GT for the track or simply elevate its aggressive aesthetic with the Roush Rear Valance Aero Foil Kit. Designed to integrate seamlessly with the factory quad-tip GT valance, this kit is engineered using advanced racing techniques to improve aerodynamic efficiencies. The aero foils strategically separate airflow beneath the car, allowing a smaller portion to follow the under-body contours, which precisely adjusts rear downforce for enhanced stability and performance.

Performance-Driven Design & Durability

  • Optimized Aerodynamics: Separates under-car airflow to fine-tune rear downforce.
  • Aggressive Styling: Adds a race-ready look to your Mustang's rear valance.
  • Seamless Integration: Designed to work perfectly with the factory quad-tip GT valance.
  • High-Strength Construction: Made from durable TPO (thermal plastic olefin) with a black stipple finish for an OEM appearance and long-lasting resilience.
  • Impact Resistant: High-pressure injection molding ensures robust impact resistance and flexible durability, while maintaining a lightweight, low-density profile.
  • Vehicle Compatibility: Fits 2018-2023 Ford Mustang GT, GT Premium, Bullitt, Mach 1, and Shelby GT500 models (excluding EcoBoost and Shelby GT350).

Whether you're hitting the track or cruising the streets, the Roush Rear Valance Aero Foil Kit provides a significant upgrade in both form and function. Get yours today at GGCRACING and experience the difference.

Vehicle Fitment

Years Make Model Trim
2018-2020 Ford Mustang Shelby GT350
2018-2023 Ford Mustang EcoBoost
2018-2023 Ford Mustang EcoBoost Premium
2018-2023 Ford Mustang GT
2018-2023 Ford Mustang GT Premium
2019-2020 Ford Mustang Bullitt
2020-2022 Ford Mustang Shelby GT500
2021-2023 Ford Mustang Mach 1

Product Details

Product Description

About Roush

Roush engineers high-quality automotive parts and accessories trusted by enthusiasts and shops across North America. At GGCRACING we stock the full Roush lineup with fast shipping and expert fitment support — order with confidence.

Watch in action

Roush Rear Valance Aero Foil Kit for 2018-2023 Ford Mustang GT

Prepare your 2018-2023 Ford Mustang GT for the track or simply elevate its aggressive aesthetic with the Roush Rear Valance Aero Foil Kit. Designed to integrate seamlessly with the factory quad-tip GT valance, this kit is engineered using advanced racing techniques to improve aerodynamic efficiencies. The aero foils strategically separate airflow beneath the car, allowing a smaller portion to follow the under-body contours, which precisely adjusts rear downforce for enhanced stability and performance.

Performance-Driven Design & Durability

  • Optimized Aerodynamics: Separates under-car airflow to fine-tune rear downforce.
  • Aggressive Styling: Adds a race-ready look to your Mustang's rear valance.
  • Seamless Integration: Designed to work perfectly with the factory quad-tip GT valance.
  • High-Strength Construction: Made from durable TPO (thermal plastic olefin) with a black stipple finish for an OEM appearance and long-lasting resilience.
  • Impact Resistant: High-pressure injection molding ensures robust impact resistance and flexible durability, while maintaining a lightweight, low-density profile.
  • Vehicle Compatibility: Fits 2018-2023 Ford Mustang GT, GT Premium, Bullitt, Mach 1, and Shelby GT500 models (excluding EcoBoost and Shelby GT350).

Whether you're hitting the track or cruising the streets, the Roush Rear Valance Aero Foil Kit provides a significant upgrade in both form and function. Get yours today at GGCRACING and experience the difference.

Vehicle Fitment

Years Make Model Trim
2018-2020 Ford Mustang Shelby GT350
2018-2023 Ford Mustang EcoBoost
2018-2023 Ford Mustang EcoBoost Premium
2018-2023 Ford Mustang GT
2018-2023 Ford Mustang GT Premium
2019-2020 Ford Mustang Bullitt
2020-2022 Ford Mustang Shelby GT500
2021-2023 Ford Mustang Mach 1

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