MoparPartsGiant.com offers the wholesale prices for genuine 2013 Ram 1500 parts. Parts like Spark Plugs, Ignition Coil, And Ignition Cables 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 4.7L, 8 Cyl 5.7L. Transmission: 6-Speed Automatic Transmission, 8-Speed Automatic Transmission.