Steeda Tri-ax, B&M Ripper. Either one of those would be good. Pro 5.0 makes a good one, too, but I'm not sure if they have one for the T45 for the 96-up stangs. There might be some others that I can't think of right now but two of the top ones are those that I first mentioned and the Steeda I've heard the best about.
------------------
1996 Mustang GTS