it's a straight-forward process. the only problems with it is the fact that it takes forever just to undo the screws, take out the protecter under the wheel well, and of course the worst part replacing the metal bar (will talk about in a sec). On the stock fender, there is a little bar that is spot welded onto the fender that attaches to the headlights, the Z3 fenders don't have this so I had to pry out the welds on the stock ones and reattach it to the new ones (this isn't hard to do once you have pryed them off).Niss200SXGTR said:How hard was it to bolt them on? how many bolt places are there? i want to get some Z3's.. Are they smooth? like.. can you wax them, and do they feel like the metal of the car?