Heads, how much gain?

As an addition to the other heads flows........we have iron head flows bordering on the insane.

Lift..............906 IN/EX ported to the max, no welding and no epoxy and using 2" ex tube

.100...............89/60
.200.............161/129
.300.............212/185
.400.............257/216
.500.............297/234
.600.............331/253
.700.............347/264

Best to buy aluminum as these would cost way more than ported aluminum heads!