Will be the twin-turbo version with the 13B engine intended to energy the 3rd-era RX-seven introduced in late 1991. Every rotor on 13B-REW has only one combustion chamber quantity of 654cc. With two rotors, the whole displacement was 1308cc. Ideal in good shape for the Mazda swap or replacement job. https://built-13b-motor-for-sale28383.blogdemls.com/38731852/new-step-by-step-map-for-built-13b-motor-for-sale