Hi, I live in the USA, and I am thinking of purchasing an S4, but want to see how many different body kits/styling pieces, as well as engine mods there are before I make my decision. I did a search, and found a few pieces, but not much. So my question is, what are some good sites to buy pieces in America? Someone told me the A4 kits fit the S4, is that so. If you cannot give me any sites, some body kit names will do, thanks guys.