Is the twin-turbo version of your 13B engine made to electrical power the 3rd-generation RX-7 introduced in late 1991. Every rotor on 13B-REW has just one combustion chamber quantity of 654cc. With two rotors, the whole displacement was 1308cc. Great in good shape for your Mazda swap or replacement task. https://jdm-mazda-rx-7-fd-13b-rew15779.blogminds.com/detailed-notes-on-jdm-mazda-rx-7-fd-13b-rew-engine-for-sale-30980066