is the twin-turbo Model on the 13B engine created to power the 3rd-generation RX-7 released in late 1991. Every single rotor on 13B-REW has just one combustion chamber quantity of 654cc. With two rotors, the total displacement was 1308cc. Great suit for just a Mazda swap or alternative project.The new Renesis engine was even now a one.3L rotary tho