OK, im doing side exit system on the big block this weekend, all 3" stainless into SS tips angle cut to match the body lines. Im going with some kind of flowmaster for this setup, i have original 40s, but im after a DEEEEEEEEEEP sound, so i think the super 40s are the way to go. Lemme know what yuou guys think, and has anyone heard these on a built motor at all ?