i have a set of #992 casting heads in great shape, came from a running motor that had very little miles on it. they have 75cc chambers, and 1.9/1.5 stainless valves with isky double springs, arp screw in studs, hardened seats of course, good for unleaded gas. no cracks, heads are clean and ready to go. perfect for circle track classes that require open chamber heads, boosted applications, ect.