Could be the twin-turbo Edition from the 13B engine designed to electricity the third-technology RX-seven launched in late 1991. Each individual rotor on 13B-REW has only one combustion chamber volume of 654cc. With two rotors, the total displacement was 1308cc. Great in shape to get a Mazda swap or substitution https://fernandoigzre.livebloggs.com/37141741/not-known-factual-statements-about-13b-rew-motor-for-sale