Ok, so by the look of it, the valves are all the same size as my A6 head. It's probably safe to say that the combustion chambers are the same size as well, which means I won't get a compression ratio increase if I put it on. Rats...heh. But, it's been completely worked, this head is sweet. EVERYTHING has been smoothed out, valves have been deshrouded, ports are all size-matched and opened up, and the valve springs are definitely not OEM Honda pieces. They're much beefier than Honda springs.

I've also got a Crower-ground cam that's matched to the head's port work, so putting this thing onto my A6 after I've broken in the new bearings and rings should be lots of fun.