Originally Posted by CrabhartLS1

aerochamber mufflers i know are very quiet compaired to most aftermarket mufflers. In general Hooker is usually more mellow and understated across the board.

I'd say that would be a good way to go if you want a quick and painless muffler swap with a good, managable sound. Aerochambers really shine when LT's are added and cats removed.

EDIT: on gains i'd say maybe 10hp, just going by usual catback hp gains.