I like a rumbly idle so flowmaster at 82 or magnaflow at the same level interests me. I just dont want in cab drone so lower decibels at higher rpms would win it for me.
what motor in the truck? side exit, dumped, straight out the back? size pipe? length of the muffler? what model flowmaster? pretty useless IMO, who has a db meter laying around, or knows by ear how loud 90 db is?