Would be the twin-turbo Variation on the 13B engine meant to energy the third-era RX-seven 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. Perfect in good shape for just a Mazda swap or substitution https://juliusbuhtr.blue-blogs.com/46751419/the-definitive-guide-to-13b-rotary-motor-for-sale