Could be the twin-turbo Edition of the 13B engine meant to electricity the third-era RX-7 introduced in late 1991. Each and every rotor on 13B-REW has only one combustion chamber quantity of 654cc. With two rotors, the whole displacement was 1308cc. Ideal healthy for any Mazda swap or substitution task. https://cashwipcm.bloginder.com/39612154/about-13b-rotary-motor-for-sale