As someone who likes to try things for themselves verses listening to the inexperienced echos of the forum, yes it can make a difference. I got what could be described as a mild "VTEC" like feel above 6k rpm that I was not expecting and witness increased MAF usage to redline. I was genuinely curious as only one other forum member had done it. Curiosity cost me $900+ all said and done. $350? for IM and $600 for the extrude-hone service. That was 4 years ago, I don't want to think of what it cost now. Personally worth it. But I'd image we are only talking about another 6-10hp here.
