Pypes Exhaust XFM16 1999-2004 Mustang GT and Cobra 2.5" Off Road X-Pipe New X-pipe kit from Pypes Performance Exhaust Fits all 1999-2004 Mustang GT; Fits 1999-2004 Cobra 2 and 3-valves (NOT 4-valves) Off-road use only without cats Two-piece x-pipe assembly, clamps & instructions included Comes with lifetime warranty on originally installed vehicle