May be the twin-turbo Edition of the 13B engine meant to electric power the 3rd-technology RX-seven introduced in late 1991. Every single rotor on 13B-REW has one combustion chamber quantity of 654cc. With two rotors, the entire displacement was 1308cc. Perfect in shape for the Mazda swap or substitution project. https://rotaryengineforsale32975.widblog.com/93654303/the-best-side-of-built-13b-motor-for-sale