From what I remember from the posts awhile ago, it was too loud for them or something like that, don't know how anything can be loud and annoying, maybe it's just me lol, I think Mac mufflers sound badazz on 5.0's, especially with an Mac Pro-Chamber, you should have gone for a true dual setup with Mac mufflers and custom h-pipe to let that 5.0 rumble even more.
I like it loud and mean. My buddy and I drove his ACR Viper for 5hrs on the highway, with suspension set on the track setting, Belanger full length headers with mufflers removed (just straight pipes).....it was loud as f*ck, raw, and crude...I loved it

ACR Vipers have the most comfortable seats. It's was his daily driver here when school was in session b/c the apartment he rented wouldn't allow him to park his 03' 3500 Ram there.
Didn't bother me at all, thats why I find it so funny when people complain of resonation or muffler being to loud, and I'm sitting over here driving in a Viper thats barely street legal and well beyond the legal db for sound allowed by law lol, and it didn't bother me at all for 5hrs on the highway. Some people must be sensitive.
You and I just have performance in our blood, we want to hear our engines rumble

I personally think Mac mufflers sound wicked on 5.0's. Our trucks would rumble like a mutha if there was a way to fit some LT's, Mac shorty Pro-Chamber and Mac catback under there, heh.