I put one in the 4kq I sold to C-note last year. He sent it to me so I'm not sure of the source, but it was a drop in, and took about 15 minutes including the R&R of the door panel. I just looked at the micro fiche (that's not a buzz word for the lawyers, is it?) and the Fox one is VASTLY different from that of the 4K. HTH, John