port polished head... who what where when why how?

[nonovurbizniz]

Ported- intake and exhaust ports are bored out to be larger or more free flowing...

Polished... makes it shiny shiny..

I'm sure it adds decent power but not enough to justify the cost unless you have the head off already...

It's mainly a last thing people do to squeeze out that last drop of power... (also it makes MORE of a difference the more power you have now so if you're stock it won't do much but if you're turboed it'll help out considerably).

It's kinda like a throttle body... not really neccisary and the money could be spent better elsewhere unless you're out of elsewheres.