Two heads - same casting, but one is a C9OE and the other is D0OE. Ports, chambers, layout, all exactly the same.

63cc chambers, 155cc intake runners, hardened seats set up for 1.94 intake/1.6 exhaust, threaded studs, new phosphor bronze valve guides, with a very good street port job.

Flow was [email protected] lift, and 170 cfm on the exhaust side.

I will try to take some pics and add them tomorrow. They are clean, with a bit of old paint adhering to the outside and glyptal in the valleys.

No guides, studs, springs, valves, or rockers included.

I was going to use these until I discovered that the bigger valves increased the chamber CC to a point that was going to murder my compression due to piston choice.