I have a 4.3 with a super 44, flapper is off and the resonator is gone. I liked the sound and the drone wasn't bad at all in my opinion. I added a cold air intake from Injen technologies and it really changed the exhaust sound around 2300rpm to 3000 rpm. Exhaust sound is a tricky situation because everyone has different opinions on what sounds good but with that said I really like the way it sounds. Not loud going down the highway or around town unless you get on it