Chill. I don't need the harassmentThe VQ engines have a VERY distinctive sound to them. I used to have a 350z and i could here one comming to this day without even looking. I have the 3" Thermal with no cat right now. Its fairly moderate when cruising or idleing. Sounds quiet. But as soon as you hit the gas it pops and screams very very loud. A cop with his window down will hear ya 3 miles away.