Will be the twin-turbo Model of the 13B engine intended to electric power the 3rd-generation RX-7 released in late 1991. Each individual rotor on 13B-REW has only one combustion chamber volume of 654cc. With two rotors, the full displacement was 1308cc. Great in good shape to get a Mazda swap https://fernandosuyaa.dm-blog.com/29879130/a-review-of-custom-rx7