May be the twin-turbo version with the 13B engine created to power the 3rd-generation RX-7 introduced in late 1991. Every rotor on 13B-REW has only one combustion chamber volume of 654cc. With two rotors, the full displacement was 1308cc. Excellent fit for your Mazda swap or replacement job. The 13B-REW https://built-13b-motor-for-sale81457.timeblog.net/74649630/top-rotary-engine-for-sale-secrets