Ok, So I have been Researching prices for Extrude honing and have decided to try a few other options first to see if I can get some similar results. My question is this, if I use a bottle brush to get in side the runners of the intake, would I be able to clean things up enough to improve air flow? I have also read a number of articles that says extrude honing is a hoax and it does not provide any other service other then making everything look pretty. Your thoughts and answers please.