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  1. 2005-2010 Mustang Talk
    Ok guys, my question is what physically makes an exhaust system sound deep, muscular, bassy, whatever you call it. Is it merely displacement? My brother has a 2006 GTO that has the same axle backs as my 4.6L GT (Flowmaster American Thunder) and that thing is unbelievably deep sounding. It's...
  2. 2005-2010 Mustang Talk
    As title says I need some opinions on what to do, I have American racing 1 3/4 longtube headers with their catted H-pipe into JBA axle backs, it is loud but I want it to be even louder and deeper sounding. Any suggestions will be great! Thanks!
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