May be the twin-turbo version with the 13B engine created to power the 3rd-generation RX-7 introduced in late 1991. Every rotor on 13B-REW has only one combustion chamber volume of 654cc. With two rotors, the full displacement was 1308cc. Best fit for your Mazda swap or substitute challenge. The 13B-REW https://weimarpups.com/