I've got longtubes on mine here is a link to my video clips of my exhaust. The setup is longtubes and o/r h-pipe from mac, flowmaster 40 series and some axleback piping, all the piping is 2 1/2"s, except for the headers which are 1 5/8. They are the last two clips are the ones with that exhaust setup.
red_blg2002's 1999 Ford Mustang on CarDomain - Page 7
red_blg2002's 1999 Ford Mustang on CarDomain - Page 7