I did the 50 series 3"in 2.5" dual out on my little reg cab hemi express. The drone was brutal in the cab. BRUTAL. Took it back off and slapped the bus muffler back on until I can figure something else out. It may not be as bad on a 4 door. I'm leaning towards coming back around and using their 70 series to still get the flowmaster sound but not rattle the change in the console. Good luck.