I have read about a lot of praise for the Joe Z intake on the my.is forums. I wanted to ask the question to my fellow bitoger's on whether you think this is worth putting on an is300 and if so what kind of gains I can expect. Oh I have an 03 IS300 and here's the link to the Joe Z thread: http://my.is/forums/f131/joe-z-intakes-stock-your-2001-2005-is300-359217/