Back in December I purchased an 07 1500 sport 5.7 hemi that already had an aftermarket gibson exhaust on it. I enjoyed the sound outside the vehicle but inside it had quite a drone in the lower gears around town. The entire exhaust was rather rusted and barely holding together in some places so I did my research and choose a magnaflow exhaust as most reviews were great in terms of being quiet in the cab. Today I installed the new magnaflow and it is much quieter at cruising speeds around town but the drone is still there at times and much worse on the highway.
My questions are 1, am I destined to be stuck with some sort of drone no matter what? And 2, is there a break in period I should consider?