Is definitely the twin-turbo Model in the 13B engine built to electricity the third-era RX-7 released in late 1991. Every rotor on 13B-REW has only one combustion chamber volume of 654cc. With two rotors, the total displacement was 1308cc. Great in good shape for the Mazda swap or substitute project. https://rx7motor62714.bligblogging.com/39616353/a-simple-key-for-rx7-motor-unveiled