MoparPartsGiant.com offers the wholesale prices for genuine 2018 Chrysler 300 parts. Parts like A/C Compressor Mounting 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. Transmission: 8-Speed Automatic Transmission.