Would be the twin-turbo Edition in the 13B engine made to ability the third-technology RX-seven launched in late 1991. Each individual rotor on 13B-REW has one combustion chamber volume of 654cc. With two rotors, the overall displacement was 1308cc. Best suit for the Mazda swap or replacement project. Tagore Autoparts https://www.nwjdmmotors.com