I, too, need to replace my exhaust on my 2500 5.7L. I put a dynomax on my race truck 72 Ford (500hp 390) and I love the unique roar it produces. I'm paranoid about having a truck like someone else and it seems that everyones hemi sounds the same. I want that brutal, no-nonsense roar that a hemi should have. I know the areo seems to be a good choice but what experience does anyone have with the dynomax on these newer hemis?