May be the twin-turbo Variation of the 13B engine made to energy the 3rd-generation RX-seven launched in late 1991. Each individual rotor on 13B-REW has a single combustion chamber quantity of 654cc. With two rotors, the full displacement was 1308cc. Ideal suit to get a Mazda swap or replacement challenge. https://rotaryengineforsale56790.blog-ezine.com/39265867/considerations-to-know-about-custom-rx7