Vorsteiner GTS-V program takes European styling to the extreme; squeezing out every ounce of design perfection. The F8X M3/M4 GTS-V program consist of a 2 piece front spoiler, Rear diffuser and side skirts. The pieces are constructed using Pre-Preg Autoclaved 2X2 Carbon Fiber. The kit is designed to work on 2015 and up BMW M4 & GTS.