Will be the twin-turbo Model of your 13B engine created to energy the third-era RX-seven released in late 1991. Just about every rotor on 13B-REW has a single combustion chamber volume of 654cc. With two rotors, the full displacement was 1308cc. Best match for any Mazda swap or substitute job. https://13brewforsale15814.blogofoto.com/60979813/new-step-by-step-map-for-13b-engine-for-sale-japan