The only stock turbo ever offered in these trucks was the 2.3L 4D55 turbo-diesel (1st gen) or 2.5L 4D56 (2nd gen), no regular petrol turbos.

Some owners have done a "retro-mod" swap of a 4G54 or 4G63/4G64 turbo mill from other Mitsubishi models, but this may not be suitable for historic registration.