The Mazda RX-7 (FC3S) (also known as Mazda Savanna) is the predecessor to the Mazda RX-7 (FD), as it is the Series 5 (S5) variant of the RX series. The FC3S Turbo-II is the North American counterpart of the Japan-exclusive Mazda RX-7 GT-X and Mazda RX-7 Infini III, which were the most powerful cars of the FC generation.