Is the twin-turbo Variation of the 13B engine built to electrical power the 3rd-era RX-seven introduced in late 1991. Every rotor on 13B-REW has only one combustion chamber volume of 654cc. With two rotors, the full displacement was 1308cc. Best in shape to get a Mazda swap or substitution undertaking. https://www.nwjdmmotors.com