May be the twin-turbo Edition from the 13B engine created to electrical power the third-technology RX-7 launched in late 1991. Each rotor on 13B-REW has only one combustion chamber quantity of 654cc. With two rotors, the whole displacement was 1308cc. Best suit to get a Mazda swap or substitution challenge. https://andersonrvwxz.bloggip.com/29824515/5-simple-statements-about-13b-turbo-engine-for-sale-explained