Would be the twin-turbo Edition of the 13B engine built to electricity the third-technology RX-7 released in late 1991. Each and every rotor on 13B-REW has a single combustion chamber quantity of 654cc. With two rotors, the overall displacement was 1308cc. Excellent healthy for a Mazda swap or substitute project. https://jdm-mazda-engine02457.canariblogs.com/jdm-mazda-engine-an-overview-53685329