My MAC system with long tubes sounds pretty mean. After the cam, heads, intake, and all the other goodies were installed it just got meaner. It emits a really low growl with a tinny/raspy sound at high revs. IMO it's the best sounding exhaust I have heard on a street car. You can hear my exhaust clips here...
http://www.mustangwarehouse.com/exha...und-clips.html
See if that sounds anything like what you are talking about. Note: these clips were recorded when my car was completely stock except for the full MAC exhaust system.
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