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. Ships Free. Rear Valance Aero Foils for the 2018-2023 GT Mustang are injection-molded for lasting durability & OEM CAD designed for a precise fit. Ready to race? 2018 Mustang, Manual and Automatic Transmission, Coupe and Convertible 2018-2023 Ford Mustang Air Freight Prohibited: false Not Carb Approved: false Ltl Freight Required: false Prop 65: Y Part Type: automotive Epa: N/A Carb Acknowledgement Required: false Fitment: Ford Mustang Bullitt 2019 Ford Mustang Bullitt 2020 Ford Mustang EcoBoost 2018 Ford Mustang EcoBoost 2019 Ford Mustang EcoBoost 2020 Ford Mustang EcoBoost 2021 Ford Mustang EcoBoost 2022 Ford Mustang EcoBoost 2023 Ford Mustang EcoBoost Premium 2018 Ford Mustang EcoBoost Premium 2019 Ford Mustang EcoBoost Premium 2020 Ford Mustang EcoBoost Premium 2021 Ford Mustang EcoBoost Premium 2022 Ford Mustang EcoBoost Premium 2023 Ford Mustang GT 2018 Ford Mustang GT 2019 Ford Mustang GT 2020 Ford Mustang GT 2021 Ford Mustang GT 2022 Ford Mustang GT 2023 Ford Mustang GT Premium 2018 Ford Mustang GT Premium 2019 Ford Mustang GT Premium 2020 Ford Mustang GT Premium 2021 Ford Mustang GT Premium 2022 Ford Mustang GT Premium 2023 Ford Mustang Mach 1 2021 Ford Mustang Mach 1 2022 Ford Mustang Mach 1 2023 Ford Mustang Shelby GT350 2018 Ford Mustang Shelby GT350 2019 Ford Mustang Shelby GT350 2020 Ford Mustang Shelby GT350R 2018 Ford Mustang Shelby GT350R 2019 Ford Mustang Shelby GT350R 2020 Ford Mustang Shelby GT500 2020 Ford Mustang Shelby GT500 2021 Ford Mustang Shelby GT500 2022