Is definitely the twin-turbo version of your 13B engine created to ability the 3rd-technology RX-7 introduced in late 1991. Each individual rotor on 13B-REW has only one combustion chamber quantity of 654cc. With two rotors, the full displacement was 1308cc. Ideal match for just a Mazda swap or substitution project. https://mazda13brewmotorforsale83693.blogoxo.com/29914493/details-fiction-and-rx7-turbo-2-motor-for-sale