What does an automotive resonator do?

Answer 1

Well, back in the day we used to have to put 2, and even 4 mufflers on a high performance car to quiet it down enough to be civilized. When we went through the feds' lookin out for our own good crap in the mid 70's, and through the 80's, the motors lost the high compression, big fat cams, and those gas slurping double pumpers, the motors really never got that throaty roar back, and certainly would not push 4 mufflers, so to make them sound more powerful, rather than muffle them, they had to resonate, or amplify them. Ford was the worst with those Mustangs.