Thanks Jim. If I understand your post correct, you have long branch manifolds, and not headers. Is that correct? Yes, I agree with you that it is not a good thing for the exhaust flange to stick below the frame rail. My comment was that I just have never had an issue bottoming it out either driving or even loading onto my trialer that has a dove tail in the back (other cars I have loaded on that bottom all the time). That got me to wonder whether one brand of tubular header may provide more clearance than others, or if I have just been lucky so far.