I installed mine in my garage. The front two were easy, just try to line everything up and drill one hole at a time, then insert a bolt, then go to the next. That way you don't end up crooked. The back two sucked a little, as you have to remove the rear fender liner and/or the side panels. The driver's side panel isn't as bad, but the passenger one sucks because of the gas cap. Still only took me about an hour and fifteen minutes, but could have been half that if not for removing the panels. The kit comes with all four fenders, an installation paper, and all the hardware. They give you more bolts than nuts...not sure why...you don't use them.