MoparPartsGiant.com offers the wholesale prices for genuine 2020 Jeep Gladiator parts. Parts like Pistons, Piston Rings, Connecting Rods & Connecting Rod Bearing 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. Transmission: 6-Speed Manual Transmission, 8-Speed Automatic Transmission.