Good friend of mine used to have his own shop and did custom exhaust. He used a lot of the Jones mufflers. Never had a complaint that I know of and the ones I heard all sounded good.
Never had a pair of em myself...biggest they make is 3".

CHIP
'70 hemicuda, 575" Hemi, 727, Dana 60
'69 road runner, 440-6, 18 spline 4 speed, Dana 60
'71 Demon, 340, low gear 904, 8.75
'73 Chrysler New Yorker, 440, 727, 8.75
'90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt
'06 GMC 2500HD LBZ Duramax