Flow masters can be loud. I had an issue with my 1995 silverado. I had duels with 2 3/4" pipe to and from the flowmasters. There was not enough back pressure and I lost a lot of power. It was loud, but did not move. It was hard to go places unnoticed. If you want loud I agree with the others and say Glass packs. Again like donyms said, sometimes you need to sneak away!