It all depends on the kind of sound you want. If going dual, first choose whether you want an X pipe or H pipe for the mid section. H produces a lower rumble, the X a little bit higher (but it produces 1-2hp more:shigrin). Next, the mufflers. Muffler deletes will be very loud, and (i know I'll probably get crap for this) produce a raspy, annoying sound on our 6ers. A chambered muffler (like Flowmaster) will produce a nice rumbly growl. Or you could go with GT takeoffs.
I went with the duel setup from NTO that comes with the X pipe and GT takeoffs for a while. Some guys swear by it, but it was too quiet for my liking, although it did produce what I considered a very aggressive "stock" sound. I swapped those out for Flowmaster AT's (50 series?) and a, quite pleased. They have a very nice, low, bassy growl in the lower (<4000) rpm range. Oh yeah, headers don't hurt either:bigthumbsup
I have and 05 with a GT take off. It sounds great and was easy and quick to install. This thread might help you out tho, it covers just about anything you need to know about v6 exhaust systems.http://www.allfordmustangs.com/foru...005-mustang-dual-exhaust-question-thread.html I also tried a Pypes violator and it was junk. The workmanship was so bad my Dad and I spent hours heating and bending the metal brackets till it fit. Even then it hung like 3in below where it should have and scraped on stuff all the time. Below 2k RPMs it sounded like a freakin dragster! But any thing above that and it sounded like a ricer. I didn't keep it on every long.
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