High Velocity Port

Hi bros! I just wanna ask if somebody tried this style of cylinder head porting by mototuneusa. How's the performance? I've been searching for almost 2 weeks reading articles on the net about different kinds of head ports
Here are some style of porting their cylinder heads:
a)ported and polished heads
b)ported but not polished heads
c)dimple porting
d)swirl porting
e)hi-velocity porting

I am quite confused and the same time interested about e)high velocity porting... I need some feedback for...

High Velocity Port

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