MoparPartsGiant.com offers the wholesale prices for genuine 2016 Ram ProMaster 2500 parts. Parts like Nameplates are shipped directly from authorized Mopar dealers and backed by the manufacturer's warranty. Parts fit for the following vehicle options. Engine: 4 Cyl 3.0L Diesel, 6 Cyl 3.6L. Transmission: 6-Speed Automatic Transmission.