Will be the twin-turbo version from the 13B engine made to electrical power the third-technology RX-7 launched in late 1991. Every rotor on 13B-REW has just one combustion chamber quantity of 654cc. With two rotors, the overall displacement was 1308cc. Great in shape for any Mazda swap or replacement project. https://mazdarx-7engine15572.blogrenanda.com/35751680/an-unbiased-view-of-rx7-13b-motor-for-sale