chris straub did have the patriot heads on sale recently though they are an additional $200 over the price of those procomps. I haven't read a single negative comment about Chris or anything he sells. Though, the patriot heads do have a smaller intake runner . . . 175 or 185, something like that. With the intake runner the rule of thumb (I think) is the higher the intake CFM the further the power band moves up the RPMs.