I have been researching like crazy to find the right muffler for my v6. I found this SDT muffler from edelbrock and it sounds pretty good. they have sound bytes for a v6 mustang with one and it sounds pretty good. They also have one for a 4.6 v8. My theory is that since the mustang's v6 is a 3.5 and the v8 is a 4.8. then my 4.3 should fall somewhere between these two and sound pretty good with one as well. here is the link.

http://www.edelbrock.com/automotive_...Mustang_V6.mp3
http://www.edelbrock.com/automotive_...ustang2006.mp3

Tell me what you guys think.
They also have links for some gm v8's