I bought the promaxx heads this year bare and put the better valves and springs in it. They seem to work well . They say its the old patriot head and its machined in the USA.. All the gaskets lined up perfect.

Promaxx took over the Patriot heads. Patriot went out of biz.

I know that but supposedly the took them over. they are even called the freedom series like the patriot ..http://www.summitracing.com/parts/pm...make/chevrolet