Any recommendations on web sites or books on building a custom exhaust? How to determine primary length, inside diameter, collector length, volume, etc. I'm looking for formulas, calculations, details. I'm not looking for suppliers, those are easy to find. I just don't want to build my own, I want to know how to build my own. It would be for normally aspirated applications.
Oh, I wasn't sure which forum to put this in so this seemed the most logical.