May be the twin-turbo version with the 13B engine intended to energy the third-era RX-7 introduced in late 1991. Each and every rotor on 13B-REW has a single combustion chamber quantity of 654cc. With two rotors, the total displacement was 1308cc. Great suit for a Mazda swap or substitution task. https://mazda13bmotorforsale72604.popup-blog.com/37706687/the-13b-turbo-2-engine-for-sale-diaries