Big Block Ford BOSS Hemi heads. We bought these heads used. They are water jacketed heads and we decided to go with solid heads for our blown alcohol high boost application. They are "CSR" Chuck Seyler Racing castings. They have Titanium valves. Intake valves are 2.450" and Exhaust valves are 1.900". They have Manley valve srings, titanium retainers, and 10* locks. They are O-Ringed. They were previously on an injected alcohol engine. More pictures available upon request.