The work needed is only doing the stud holes on the arches to hold it on. Then you need to either cut the door edge to fit around the arch and fill the holes, or cut the arch down the middle along the door line and fill the holes. Look for Tweeks thread on fiestaturbo and you'll find both examples in one thread. The bumpers just go straight on (though you may need to lop off the front tow loop like I did).