MoparPartsGiant.com offers the wholesale prices for genuine 2015 Chrysler 300 parts. Parts like Emission Control Vacuum Harness are shipped directly from authorized Mopar dealers and backed by the manufacturer's warranty. Parts fit for the following vehicle options. Engine: 6 Cyl 3.6L, 8 Cyl 5.7L, 8 Cyl 6.4L. Transmission: 8-Speed Automatic Transmission.