May be the twin-turbo Edition of the 13B engine designed to electrical power the third-era RX-7 released in late 1991. Each rotor on 13B-REW has only one combustion chamber volume of 654cc. With two rotors, the entire displacement was 1308cc. Fantastic in good shape to get a Mazda swap or https://gunnerqotec.get-blogging.com/39419432/the-definitive-guide-to-13b-rotary-motor-for-sale