Could be the twin-turbo Edition of the 13B engine created to energy the third-technology RX-7 released in late 1991. Just about every rotor on 13B-REW has an individual combustion chamber quantity of 654cc. With two rotors, the overall displacement was 1308cc. Excellent fit for your Mazda swap or substitute task. https://rotary-engine-for-sale47801.blogkoo.com/a-simple-key-for-13b-rotary-motor-for-sale-unveiled-58225735