Is the twin-turbo Model from the 13B engine built to energy the third-technology RX-seven released in late 1991. Each and every rotor on 13B-REW has only one combustion chamber quantity of 654cc. With two rotors, the entire displacement was 1308cc. Great fit for any Mazda swap or replacement challenge. Recommendations https://elliottyiihf.blogs100.com/30237780/details-fiction-and-rx7-13b-motor-for-sale