Could be the twin-turbo version with the 13B engine made to electrical power the 3rd-technology RX-7 launched in late 1991. Each rotor on 13B-REW has just one combustion chamber quantity of 654cc. With two rotors, the entire displacement was 1308cc. Excellent fit for just a Mazda swap or replacement challenge. https://caidengarld.is-blog.com/45715343/details-fiction-and-rotary-engine-rx7