Is the twin-turbo version of the 13B engine meant to electric power the 3rd-generation RX-seven released in late 1991. Each individual rotor on 13B-REW has only one combustion chamber quantity of 654cc. With two rotors, the overall displacement was 1308cc. Best healthy for a Mazda swap or replacement project. Congratulations! https://augustkspng.thelateblog.com/34427952/jdm-mazda-rx-7-fd-13b-rew-engine-for-sale-no-further-a-mystery