Is the twin-turbo Edition in the 13B engine intended to electric power the 3rd-era RX-7 launched in late 1991. Every rotor on 13B-REW has a single combustion chamber quantity of 654cc. With two rotors, the entire displacement was 1308cc. Ideal in good shape for your Mazda swap or substitute project. https://johnnyzmuyt.ltfblog.com/29116323/mazda-13b-motor-for-sale-an-overview