As usual I was way off. Did I mention I don't know much about this stuff. What I'm getting is basically one head off the v12. 2 valves per cylinder 12 port cross flow. Stainless steel intake and exhaust valves, steel spring seats, valve stem locks, Titanium valve spring retainers, valve springs, valve stem seals, stainless steel roller rocker arms, steel port plugs, 2 head gaskets, valve cover and o ring seal. total cost $5700 plus shipping. I had a long discussion with them about my setup and wanting to keep a roots blower for looks and they said 800 hp should be no problem. Sorry about the bad info. I'm an idiot.The journey continues. I'm trying to add pictures but as usual I suck at it.