May be the twin-turbo version on the 13B engine created to ability the 3rd-technology RX-7 introduced in late 1991. Each and every rotor on 13B-REW has a single combustion chamber volume of 654cc. With two rotors, the whole displacement was 1308cc. Ideal healthy for any Mazda swap or replacement challenge. https://mazda-rotary-engine-sale96952.blogsidea.com/36017095/the-greatest-guide-to-13b-engine-for-sale