My buddy's new exhaust company T-PHLO here's a set of his mufflers on a Mach 1
2003 STOCK MACH1 MUSTANG T-PHLO EXHAUST "TRIA SERIES MUFFLERS" (TPHLO MUFFLERS) - YouTube
2003 STOCK MACH1 MUSTANG T-PHLO EXHAUST "TRIA SERIES MUFFLERS" (TPHLO MUFFLERS) - YouTube