The two guys I know are using stock frames and they fabed up their own plates based on the Street and performance plate. By the way that company is pretty much the most disorganized operation I have ever came across. No one knows anything. When holding to talk to their "header guy" SEVEN different people come on the line during my hold time asking "Who are you holding for". And for being in the business for as ling as they have been why is there a 4 week back order on lsx 1st gen f body headers???