Didnt find much about install on the N-Fab website and they never emailed me back when I inquired. (That's a strike) I checked Smittlybilts website since they are supposed to be the same bar. They say drilling is required. http://www.smittybilt.com/product/index/3.htm
That is another strike since I want to avoid drilling the frame. This sucks because it is a really cool looking nerf bar.