Exhaust sound?

[escape442]

There is a SD racing around here that sounds like a sick sports car. I suspect it is a V-10 with a modified exhaust. I would be embarassed if my truck sounded like that. Any ideas what he did?

[MotorOFF]

I've got a friend with an SD V10 that put a Flowmaster on it with dual tips. This thing sounds like a Ferrari!!!!! I'm a hotrodder and have never heard anything made in America sound like that before. When he revs it, you expect see a Diablo blow by...