Is the twin-turbo version with the 13B engine built to energy the 3rd-era RX-seven released in late 1991. Every single rotor on 13B-REW has one combustion chamber volume of 654cc. With two rotors, the total displacement was 1308cc. Best fit for any Mazda swap or replacement challenge. Apex seal fragments https://jdm-mazda-rx-7-fd-13b-rew55195.link4blogs.com/55126460/detailed-notes-on-jdm-mazda-rx-7-fd-13b-rew-engine-for-sale