MoparPartsGiant.com offers the wholesale prices for genuine 2020 Jeep Wrangler parts. Parts like Engine Assembly And Service Long Block Engine are shipped directly from authorized Mopar dealers and backed by the manufacturer's warranty. Parts fit for the following vehicle options. Engine: 4 Cyl 2.0L, 6 Cyl 3.0L Diesel, 6 Cyl 3.6L. Transmission: 6-Speed Manual Transmission, 8-Speed Automatic Transmission.