May be the twin-turbo Variation from the 13B engine meant to electrical power the 3rd-technology RX-seven released in late 1991. Each and every rotor on 13B-REW has only one combustion chamber quantity of 654cc. With two rotors, the entire displacement was 1308cc. Great fit for any Mazda swap or alternative https://13brewengineforsale37800.blogpixi.com/30046981/not-known-details-about-built-13b-motor-for-sale