I got the four bolt MM plates. I was nervious cause I had never done them before. I am a rookie to a lot of do it yourself stuff. I did this myself with a lot of supervision. I was very easy. My impace gun helped a lot, but no special tools. I recomend the Maximum Motorsports plates. After seeing the install, how easy it was, and the quality of the products, he is switching his two stangs over to them.