51 I am in the process of using patch panels on the floor, toeboard and cowl of my 49 sub. I bought the cowl panels from Chevy duty and had to do a lot of cutting and fitting to get them to work. I bought the floor and toeboard panels from LMC and it looks like the same deal. The floor panels have the Tiawan sticker on them. I think all these patch panels are made in China no matter who sells them and in my limited experience they will all have to be altered to make them work. Also on mine I didn't use the entire panel only what was necessary. Weeds