MoparPartsGiant.com offers the wholesale prices for genuine 1999 Jeep Wrangler parts. Parts like Caps & Covers are shipped directly from authorized Mopar dealers and backed by the manufacturer's warranty. Parts fit for the following vehicle options. Engine: 4 Cyl 2.5L, 6 Cyl 4.0L. Transmission: 3-Speed Automatic Transmission, 5-Speed Manual Transmission.