Boring out engine

Hey guys i was told by a friend that a good way to start off with engine performance is to bore it out, like 40 over, he says that its low enough to still maintain reliability , i was just curious how much the costs and horse power gains on that would be. Any replies are greatly apreciated.
thanx alot
-JJ- Out

Are you serious? you made two of the exact same thread? Do it again and get banned, I answered you already.