Is the twin-turbo version of your 13B engine intended to electrical power the 3rd-era RX-seven launched in late 1991. Each individual rotor on 13B-REW has an individual combustion chamber quantity of 654cc. With two rotors, the total displacement was 1308cc. Best match to get a Mazda swap or replacement project. https://rx7engine07080.aioblogs.com/91561522/5-simple-statements-about-rx7-13b-motor-for-sale-explained