I'm quite sure Mike Dunn would know. But I would have to say that they are the loudest things I have ever heard. Much louder than any jet engine I've been around. I run a forums on NHRA racing, so maybe some of the guys on there know. www.DragChat.com Come in and join...it's free like this one.

by the way, I am new here and likin' it! I have a 48 willy's CJ2A and am actively looking for a project 56 or 57 chevy.