Is this a turbo head?

[84svounoh]

6698

6699

6700

6701

6702

Thanks for the help!

[k98dave]

Looks like it. Are there any other numbers on the casting?

[Schlodes]

It is a turbo head.

Actually... stick a magnet to the ex valve heads.. if it doesn't stick it's a turbo head likely b/c the valve are inconel.