Would be the twin-turbo version of the 13B engine built to electricity the 3rd-generation RX-seven launched in late 1991. Each individual rotor on 13B-REW has an individual combustion chamber volume of 654cc. With two rotors, the overall displacement was 1308cc. Ideal in good shape for the Mazda swap or replacement https://mazdarx-7engine21504.pages10.com/5-tips-about-13b-turbo-for-sale-you-can-use-today-74204853