50's are quieter
3 chambers are definitely quieter with out any, or at least much, increased back pressure. I use the 50 series and can't stand much more noise than I have now. Of course, I don't have any cats as I drive an antique (LOL).
Rev
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'66 Coupe, 306, 350-375 HP, C-4, 13.07 e.t., 104.8 mph, 1/4 mi.
O.B.C. #2
'66 coupe
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