My 68 GTX 440 with big Voodoo cam has Hemi style mufflers and stock manifolds. Had a wicked drown at 30 35 miles an hour. Put a set of magnaflow resonators drown gone but did get quite a bit quieter. My super bee 440 with 509 mopar cam X pipe and dynaflow mufflers sounded mean but same thing had a wicked drown at 30 35 miles an hour again went with magnaflow resonators drown gone but so is the mean sound. Any one with cammed up motor and stock manifolds found a good performance muffler that sounds good with no drown ?
