S550 Widebody Kit

The SHIROKAI 2015–2017 Mustang S550 Widebody Kit is engineered to give your GT or EcoBoost Mustang a wider presence and accommodate aggressive wheel and tire setups while maintaining clean body lines. Each component is CNC-cut from platform-specific 3D scan data, utilizing automotive-grade ABS plastic for durability and a premium feel. This kit provides a significant width increase, adding +3.54 inches per side to the front and +4.33 inches per side to the rear, totaling 220 mm across both axles. The comprehensive 6-piece kit includes front fender flares, rear fender flares, side skirts, bumper endings, a front lip spoiler, and a ducktail spoiler. The surface is ready for wrapping directly out of the box, though light sanding and primer are recommended for optimal paint results. Installation is a bolt-on process requiring drilling and rivnuts, with an estimated time of 12-16 hours for a professional body shop. This widebody kit is a direct, plug-and-play fit for 2015–2017 Mustang GT and EcoBoost models with the stock bumper. For 2015-2017 Convertible models, the kit fits, but the ducktail spoiler is excluded due to differences in trunk lid geometry. Shelby GT350 models and those with non-GT bumpers require minor front bumper modifications for proper integration of the bumper endings with the flares. This kit is specifically designed for the pre-facelift S550 and is not compatible with 2018–2023 facelift models, which require a different kit.