Is definitely the twin-turbo version in the 13B engine built to power the third-generation RX-7 released in late 1991. Each rotor on 13B-REW has only one combustion chamber quantity of 654cc. With two rotors, the full displacement was 1308cc. Perfect in shape for your Mazda swap or substitution project. I https://lorenzogctgb.blog-mall.com/39607160/new-step-by-step-map-for-built-13b-motor-for-sale