I recommend using a right angle driver to install, easier to fit between fender and tires. You only need to back out two factory screws, position the flap with the (pre applied) 3M double side pressure tape, reinsert the factory screws and apply one metal clip on the upper portion of the flap. There is no need to drill anything. I applied these over wheel well liners in the rear with no problem with fit. Only part of product I thought could use improvement was the clear vinyl paint protector strips. Pre-cut was an exaggeration; the outline of the cut pieces was very difficult to see on the white backing and the die cutter didn't seem to get all edges uniformly cut full depth so peeling off took a little extra care, the film will stretch a little goofy with just the warmth of your hands if you handle it much. It is forgiving in positioning and adhesion using the soapy water method described in the instructions, but even if you struggled with that don't sweat, the mudflap itself fits precisely so it flattens and covers most all of the film anyway.
Rating: [5 of 5 Stars!]