Looks like Frankenstein updated the website with the correct flow data...

 

OP I understand what you are asking although I think that cam will work with any LS1/2/6 head. Ported or stock. The heads that would be a better choice would be those with better mid/low lift flow nos. and those flow nos. approaching peak lift. Then there is the intake manifold to consider, then the exhaust, then valvetrain, intake before the manifold, then drivetrain.

 

But the website still says 216cc in description. Never heard an answer from my tuner on the final verdict on the port size. I'm assuming 224 though. Hopefully I'll have mine back soon