Is the twin-turbo Variation on the 13B engine intended to electrical power the 3rd-technology RX-7 released in late 1991. Each individual rotor on 13B-REW has one combustion chamber volume of 654cc. With two rotors, the full displacement was 1308cc. Best suit for a Mazda swap or alternative challenge. Universal Product https://www.nwjdmmotors.com