i run hooker supercomps, about a foot and a half of exhaust piping and dumped flowmaster 40's right under my seat. it's got a good, deep rumble that shakes your guts and sets off car alarms when loping past but isn't that loud. i can have a conversation in the car no problem. i have run open headers in the past, and i can tell you it gets old pretty fast on a long drive. plus, if you develop any other noises, you won't be able to hear them. the cops also don't like it very much. just some things to think about. at least grab some ear plugs.