I have a brand new Bassani 5 piece x pipe(4 valves, Mach 1 and Cobras) and Borla Stinger Kit for a 99-04 Mustang, Mach 1, Bullitt, (Borla not for Cobras). I had bought them both for my 04 Mach 1, but I ended up trading her in for a 03 Cobra so needless to say I don't need this exhaust set up...