We would like to apologize for the inconvenience of a second trip.
We know your time is valuable and we sincerely hate to waste any of it.
Obviously, if the line wasn't tightened properly or just came loose from vibration, we will most certainly take care of that.
Just let us when is the most convenient time for you and we will get it taken care of.
I'm sorry to hear that you are not completely happy with the sound of your truck. We understood that you wanted minimal sound inside. According to Flowmaster's website, the Delta Flow is the correct choice for the sound level you requested. The HD version states it offers "Moderate internal sound" whereas the Delta Flow states "Minimal internal sound".