cost is totally up to you, it can be free if you have a weekend and some tools. there are some great instructions in the how to forum. and replacing the wheels are up to you also, you dont have to replace them, lots of people leave the stockies on and drop it. other than that you would just have to call some places and see what installs would run, you might call some dealerships in your town. like i called a ford dealership to get my quote for that. and arent eibachs like 1.5'' all around, and like 230.00 costwise. oh and for installs i have heard from 90 bucks to 400(omg) which is really high.