I think it'll be close. The Aerochambers are pretty mellow anywhere BUT WOT, then they scream pretty good. The Magnaflows are about the same IMO.
I have a pair of 4" Hooker Max Flows (straight through style) for my cuda and was VERY surprised how quiet they are.
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
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