I'm a new member and a new challenger owner. I recently had flowmaster super 44's put on but kept the reso's in place. I liked the sound but it was pretty quiet. I then had the reso's removed and it sounds awesome driving through town but when I hit the highway, it's like godzilla is singing in my back seat. I believe that I have met the dreaded drone monster and I don't think we're gonna be friends. I'm seriously thinking about putting the reso's back on, but what I really want is a nice middle ground. I really like the sound of the 44's but my ears can't handle the cabin drone without reso's. Anybody have any cost-conscious suggestions? Much appreciated.