I did have to drill holes. The front "screw" was a rivet.I'm sure if you bought some poly spacers and longer bolts it's possible to install without drilling new. But when I was installing it was -15* F outside and I don't have any more motivation. I would rather have a couple of holes then paint chiped off because of all of the salt and sand they use around here. I've owned Rally-armor in the past, they will be the most likely the ones I buy.Brighton, did you have to drill holes? or could you use any existing? A picture of the inner fender well would be great!