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Put it this way, I "HAD" flows on my GT. They're deffinitly better sounding than MAC, but the upper end is still not the best. Now on an O/R H pipe set up they do sound pretty good, even for sixers, but past 3500 RPMS they get very weird sounding, and up top they're still rather high pitched.
but then again bro its a GT. Cant compare it to a V6 exhaust. Speaking of MAC I love my MAC TRUE DUAL SETUP with no crossovers or anything. It sounds damn good for a sixer!
well in time we will know which sounds better on my car mac or flowmaster.........by the way the macs are still for sale...make an offer will take almost anything for them