Will be the twin-turbo Model in the 13B engine intended to electric power the third-technology RX-seven released in late 1991. Every rotor on 13B-REW has one combustion chamber volume of 654cc. With two rotors, the total displacement was 1308cc. Great fit for your Mazda swap or alternative venture. About VehicleHistory.com https://13b-rew-engine-for-sale57765.bloggactivo.com/29337005/new-step-by-step-map-for-rx7-13b-motor-for-sale