I run the Ultra-Flows in my 3" full exh system thats out to the back of the car and I use the X-pipe. I can say it is not as noisey as many cars out there when idleing or cruising. But when I nail it then it is alot louder. But I can listen to my radio when cruising along with no trouble. Ron

Here is a clip of it idleing and driving off at light throttle.

https://www.youtube.com/watch?v=bYIM2HLaOI4&feature=related

Last edited by 383man; 06/02/15 10:34 PM.