MoparPartsGiant.com offers the wholesale prices for genuine 2021 Chrysler 300 parts. Parts like Parking Aid are shipped directly from authorized Mopar dealers and backed by the manufacturer's warranty. Parts fit for the following vehicle options. Engine: 6 Cyl 3.6 L FLEX, 6 Cyl 3.6 L GAS, 8 Cyl 5.7 L GAS.