Had Nerf bars on the machine I sold{ kept them}, so I cut them down and mounted them onto my pioneer. I figured that I may as well add in the under floor protector's as well. I used a piece of salvaged Alum. for the protector. There's enough room to easily wash out any mud etc; .I mounted them to the frame with a piece of angle iron that's bolted to the frame.I removed the plastic frame caps and had no problem putting a nut inside the frame to hold the mounts on.