That engine skid is just a plastic cover. The fuel tank one is steel though but its the wrong one for attaching the stock transfer case skid. You will need an extra bracket or a new fuel tank skid that has the mounting holes. If you want OEM skids I recommend this place Jparts Their prices are good and they seem to have them in stock unlike most dealers. It is an actual Jeep dealer I got my skids from them and so have a few other people. Of course for after market you have the steel armadillo and 4xGuard stuff. On my first build I just got the RC spacers and spent the rest on skid plates. The armor allowed me to have a great time worry free on the trails. I would recommend wheeling full armor with no lift over any lift with no armor.