FordPartsGiant.com offers the wholesale prices for genuine 2015 Lincoln MKS parts. Parts like Cooling System Pipes and Hoses are shipped directly from authorized Ford dealers and backed by the manufacturer's warranty. Parts fit for the following vehicle options. Engine: 6 Cyl 3.5L DOHC T/C, 6 Cyl 3.7L DOHC, 6 Cyl 3.7L PFI NA. Transmission: 6-Speed Automatic Transmission 6F50, 6-Speed Automatic Transmission 6F55.