Highest flowing sbm heads?

That type of outlook is soooo laughable and full of holes i'm surprised someone as dense as yourself couldn't even see it........so please tell me how hard is it to make your own tires...cause you don't buy them, not you, how hard is it to forge your own wheels, cause you don't buy them...
Sure, but I don't go around running my chops like I'm trying to be some sort of tire or wheel expert either.
The only opinion you can give is who has built a good engine for you, other than that, not much else.