Widebody Kit +3.54" Front / +4.33" Rear

The SHIROKAI 2018–2023 Mustang S550 Widebody Kit is designed to give your GT or EcoBoost Mustang a more aggressive stance and accommodate wider wheel and tire setups. Each component is CNC-cut from 3D scan data of the OEM body for precise fitment and follows the factory body lines. Constructed from automotive-grade ABS plastic, this kit includes front and rear fender flares, side skirts, bumper endings, a front lip spoiler, and a ducktail spoiler. The kit adds +3.54 inches of width per side to the front fenders and +4.33 inches per side to the rear fenders, for a total of 220 mm across both axles. This increased width allows for more aggressive wheel and tire configurations, supporting setups like 19x11 or 20x11 wheels with 295–315 mm tires in the rear, and 19x10 wheels with 275–285 mm tires up front. The ABS material is ready for wrapping directly out of the box, though light sanding and primer are recommended for a superior painted finish. Installation is estimated to take 12–16 hours at a body shop. The kit is a plug-and-play solution for 2018–2023 Mustang GT and EcoBoost models with the stock bumper. Drilling and the use of rivnuts are required for mounting the flares. Professional installation is recommended for optimal results. Fitment details include: 2018–2023 Mustang GT and EcoBoost models are plug-and-play. Convertible models will fit the main kit components, but the ducktail spoiler is excluded due to a different trunk lid geometry. The 2018–2020 Shelby GT350 and non-GT bumper models require minor front bumper modifications. This kit is specifically for the post-2018 S550 facelift models and will not fit pre-facelift 2015–2017 Mustangs, which require a separate kit.