May be the twin-turbo Edition from the 13B engine made to electrical power the 3rd-era RX-7 released in late 1991. Just about every rotor on 13B-REW has an individual combustion chamber volume of 654cc. With two rotors, the full displacement was 1308cc. Best suit to get a Mazda swap or https://simonyzytp.bloggosite.com/36330028/13b-engine-for-sale-options