I thought I replied back the other day, but I guess I must of hit the back button.
Anyhow the regular hibore is built on a 530 (not exact but ball park didn't take time to find exact number at the moment.) frame, and then the cut out makes it play around 380cc. The new hibore xl is going to be larger and closer to 460 playing size.
The hibore xl tour will be a smaller head than the regular xl verison and it will be 3* open to make it more workable.
Anyhow the regular hibore is built on a 530 (not exact but ball park didn't take time to find exact number at the moment.) frame, and then the cut out makes it play around 380cc.
It's built on 520cc chassis which extends face profile and footprint; the actual head volume is 340cc.