The preliminary version of the engine was first seen in the Concept-cX test car introduced in 2007. The larger was first exhibited in the Concept-ZT test car introduced in the same year and later used in the Concept-RA test car introduced in 2008."MITSUBISHI Concept-cX", Mitsubishi Motors press release"Mitsubishi Motors lineup at the 40th Tokyo Motor Show" , Mitsubishi Motors press release"Mitsubishi Motors new "MITSUBISHI Concept-RA" to receive global premiere at 2008 Detroit Motor Show, Mitsubishi Motors press release"Mitsubishi Motors Lineup at 2008 North American International Auto Showto receive global premiere at 2008 Detroit Motor Show, Mitsubishi Motors press release
