Would be the twin-turbo version from the 13B engine meant to electric power the third-era RX-7 introduced in late 1991. Every rotor on 13B-REW has an individual combustion chamber quantity of 654cc. With two rotors, the overall displacement was 1308cc. Excellent in shape to get a Mazda swap or substitution https://13b-twin-turbo-engine-for73692.blogocial.com/the-greatest-guide-to-13b-engine-for-sale-65791036