Could be the twin-turbo Variation on the 13B engine built to energy the 3rd-generation RX-seven launched in late 1991. Each and every rotor on 13B-REW has a single combustion chamber quantity of 654cc. With two rotors, the entire displacement was 1308cc. Fantastic fit for your Mazda swap or substitute project. https://augustaarwn.snack-blog.com/39069724/jdm-mazda-engine-an-overview