Minor trimming of the moldings is required (can be done with scissors). This is a flexible ABS-plastic trim set. The set consists of 4 moldings (one piece for each wheel). Each piece has a 3M-adhesive strip on the back. Gives your X6s fenders a wider/more aggressive profile while offering extra protection against door dings (the areas above the X6 wheels are notorious for being ding magnets and dings in that area are not easy to remove). Installation takes 5 minutes and they can be removed anytime. These high-quality moldings are installed onto your X6s current fender moldings (they do not replace the old molding). They are made to withstand all weather types/temperatures and come with a 5-YEAR WARRANTY (if you have any problems with the trim over the next 5 years, we will replace it FREE)!