Flowmasters too LOUDDDD..& Cuda Duals...

Hay, guys. I got Flowmasters on the Duster. They are the 40 series with
an X-pipe. The only complaint with my system is a drone or vibrating at
about 35-40 mph. At highway speeds it is real quiet in the car. I have the
factory sound deading still in the car. I don't think it's that bad. Did I do
something wrong to have it that quiet. It did get a little more of a drone
after I put the X pipe on. The slight noise at 35- 40 I can live with.