Could be the twin-turbo Variation of the 13B engine designed to ability the 3rd-era RX-seven launched in late 1991. Just about every rotor on 13B-REW has an individual combustion chamber volume of 654cc. With two rotors, the total displacement was 1308cc. Ideal match for any Mazda swap or substitution project. https://jdmengineforsale.com/