Could be the twin-turbo Edition from the 13B engine meant to electric power the third-technology RX-7 released in late 1991. Every single rotor on 13B-REW has a single combustion chamber volume of 654cc. With two rotors, the total displacement was 1308cc. Best match for a Mazda swap or alternative venture. https://jdmmazdaengine46790.mpeblog.com/69361141/the-2-minute-rule-for-13b-turbo-2-engine-for-sale