May be the twin-turbo version of your 13B engine built to electrical power the third-era RX-7 launched in late 1991. Each rotor on 13B-REW has a single combustion chamber quantity of 654cc. With two rotors, the whole displacement was 1308cc. Fantastic fit for just a Mazda swap or substitute project. https://judahxpblv.blogchaat.com/39152656/not-known-details-about-mazda-13b-motor-for-sale