Could be the twin-turbo version of the 13B engine built to energy the 3rd-generation RX-seven released in late 1991. Every single rotor on 13B-REW has an individual combustion chamber quantity of 654cc. With two rotors, the entire displacement was 1308cc. Fantastic in shape for a Mazda swap or substitute project. https://13b-turbo-for-sale34455.blogvivi.com/31457957/mazda-13b-rew-motor-for-sale-secrets