Is definitely the twin-turbo Model in the 13B engine designed to electric power the third-technology RX-seven introduced in late 1991. Each rotor on 13B-REW has one combustion chamber volume of 654cc. With two rotors, the overall displacement was 1308cc. Excellent fit for your Mazda swap or replacement job. The 13B-REW https://www.nwjdmmotors.com