Is the twin-turbo Variation on the 13B engine made to power the third-generation RX-7 released in late 1991. Just about every rotor on 13B-REW has just one combustion chamber quantity of 654cc. With two rotors, the full displacement was 1308cc. Great in shape for a Mazda swap or substitute undertaking. https://jdmmazdarx-7fd13b-rewengi09630.p2blogs.com/32724545/the-definitive-guide-to-jdm-mazda-rx-7-fd-13b-rew-engine-for-sale