exhaust questions

As of right now I have flow master 40 series mufflers on my duster and the drone has taken its toll on me. They sound bad *** at full throttle. And at idle but I can't hear my self think Sometimes .These are on my 410 stroker .my 1st question is what's an ALTERNATIVE MUFFLER THAT FLOWS WELL AND HAS VERY GOOD SOUND???. And my second thing is I have 3inch x pipe on the car dumped at the axle. Would exiting pipes all the way out the back be possible w/ 3inch? And is there any hp loss when doing this . . Thanks guys

I did a little research on this and with 3 inch pipes to the mufflers and (get this) 2 1/4!! tail pipes there was no loss of power. This was on a 455 pontiac this was confirmed by comparing 1/4 miles times and trap speed. Mufflers and crossovers had about a 2 mph difference between best and worst. I will try and find a link and post it.