I installed this on a 8ft box 02 Chevy Silverado 1500 it took about 2 hours. Drilling the holes was easy, I routed the air ducts into a larger tube because I slid it into the frame, hopefully this will prevent a hole from rubbing through. I also ran part of the valve stem into the back of the truck because I didn't want to drill my new bumper. Very easy to install, just read the instructions, it has different functions for specific cars. As you can see in the picture I had plenty of room for…