The Porting was done by DART Machinery (www.dartheads.com), in Troy Michigan. They are a very well known company and do great work. It has Stock valves, the valve seals are about 5 months old. Stock Cams, Stock cam gears. The head has 60,000 miles on it. I was the only owner of this head, I bought it new from Honda and worked on it. Do you want the valve cover too?