This is a rc4wd blazer bed converted to a truck bed. The extension end piece makes this into a 13.1 inch wheelbase when used with the converted blazer cab. It has been seamlessly glued on with no lines on the bed sides or the inside of the bed. All of the hard time consuming gluing, filling, and sanding has been done, I even carved out a fuel filler door. Almost ready for paint, just a light sand, fill a minor nick, and it's ready. This is for the bed only! If you have any questions, please ask.