RCF Carbon Fiber Side Skirts and Rear Bumper Skirts: As a complement to our RCF front lip our side and rear skirts serve both a functional and aesthetic purpose. Skits act as a barrier to reversion of air from the sides of the car to underneath the car – thereby reducing lift and improving high speed stability and downforce. Our lips are made from 100% carbon fiber. Unlike some of the cheap brands out there, our skirts are 3 dimensional parts, not just a single layer skin that is hollow from below. Fit and Compatibility: Lexus RC-F 2015 +