I don’t have the exact set of heads in my hands yet…Promaxx had one set show up available this week so my local shop who is their Canadian dealer ordered them….saying that I have a friend that has built at least 20 small/big block Mopars with them and they have all been great…I have looked at lots of them personally and can say are well made…saying that the old EQ heads could make the same power for half price