Would be the twin-turbo version with the 13B engine built to ability the 3rd-generation RX-7 introduced in late 1991. Just about every rotor on 13B-REW has just one combustion chamber volume of 654cc. With two rotors, the whole displacement was 1308cc. Perfect in shape for any Mazda swap or replacement https://rx7engine07080.aioblogs.com/91561522/5-simple-statements-about-rx7-13b-motor-for-sale-explained