Is the twin-turbo Model from the 13B engine created to electric power the 3rd-generation RX-7 introduced in late 1991. Every single rotor on 13B-REW has a single combustion chamber volume of 654cc. With two rotors, the full displacement was 1308cc. Great match for a Mazda swap or substitute project. Congratulations! https://andyvrkap.tinyblogging.com/5-easy-facts-about-jdm-mazda-rx-7-fd-13b-rew-engine-for-sale-described-77496414