FordPartsGiant.com offers the wholesale prices for genuine 2003 Ford Mustang parts. Parts like Soft Top Frame are shipped directly from authorized Ford dealers and backed by the manufacturer's warranty. Parts fit for the following vehicle options. Engine: 6 Cyl 3.8L OHV EFI, 8 Cyl 4.6L DOHC EFI, 8 Cyl 4.6L DOHC EFI S/C, 8 Cyl 4.6L SOHC EFI. Transmission: 4-Speed Automatic Transmission 4R70W (AODE), 4AT 4R75W, 5-Speed Manual Transmission (T450D), 5-Speed Manual Transmission T5OD, 5-Speed Manual Transmission TR3650, 6-Speed Manual Transmission Tremec T56.