Truth be told, I like the way they sound too on most applications. One of my buddies has a 3" system on a '73 Rallye Charger & the car sounds great - REALLY nice! BUT, a few years ago we rode to a show in it 35 miles away & I'll tell you, the resonance was bad enough that I had a headache by the time we got there, plus my ears were ringing. Flowmasters do have the resonance thing really going on bad.