undo the front fender lining where it attaches to the stock skirt. then slip the skirt over the factory one. you may need to undo the factory clips to slip it on. once its on, put the factory screws back in. use some sheet metal screws and screw the ends of the skirt into the factory one. my shop used screws to screw the top of the skirt into the factory one. some ppl use double sided tape. its up to u