Would be the twin-turbo Model in the 13B engine made to ability the third-technology RX-seven launched in late 1991. Each and every rotor on 13B-REW has just one combustion chamber quantity of 654cc. With two rotors, the overall displacement was 1308cc. Best suit for any Mazda swap or substitution challenge. https://rx7engine79023.ivasdesign.com/60036637/rx7-motor-things-to-know-before-you-buy