Like most of you, I'm always looking for ways to make more power. Just last week I made my own cold air kit and now I'm thinking of incorporating the Tornado into my 4" intake piping. For those who haven't heard of it you can go to http:www.Tornadofuelsaver.com and see how this product added 20 RWHP to an Impala. Has anyone tried this? I'm about to and I'll keep you posted.