May be the twin-turbo Variation with the 13B engine intended to energy the third-technology RX-seven introduced in late 1991. Every single rotor on 13B-REW has a single combustion chamber volume of 654cc. With two rotors, the entire displacement was 1308cc. Perfect healthy to get a Mazda swap or substitute project. https://rx7-engine24567.amoblog.com/examine-this-report-on-rx7-turbo-2-motor-for-sale-60687345