Suggestions for muscle car sound muffler without drone

A body would use the shrotcase dynomax hemi turbo , I have 2.5's with mandrel pipes and factory big block A body exhaust manifolds and it has an awful drone .

i had the large case 3" super turbos and a x-pipe on my dart.. no drone at all..

seems when comparing friends cars. the ones that have exhaust manifolds have terrible drone with dynomax mufflers. the ones with headers don't seem to drone. don't know what the deal is with that.