FordPartsGiant.com offers the wholesale prices for genuine 2011 Ford Mustang parts. Parts like Air Conditioning System are shipped directly from authorized Ford dealers and backed by the manufacturer's warranty. Parts fit for the following vehicle options. Engine: 6 Cyl 3.7L PFI NA, 8 Cyl 5.0L MOD DOHC SEFI NA, 8 Cyl 5.4L DOHC EFI S/C ALUM. Transmission: 6-Speed Automatic Transmission (6R80), 6-Speed Manual Transmission (T56), 6-Speed Manual Transmission-MT82.