No John, but I bet it's not much of a difference, I can weigh the two sets I tested when I get them back but due to variability it won't be an accurate comparison.


As far as Dudeks Hemi picking up 12HP, I have no doubt that he did, as I said above:

I think there is a limit to gains you can expect but IMO every engine will benifit differently from it. As I've said before, you chase the bottle necks in the combo, if the bottleneck is the manifolds it will make a bigger difference and push the bottle neck to some other area needing improvment to gain more HP.

His combo obviously needed more exhaust flow and the EH process helped his engine in that respect more than it helped mine.