Would be the twin-turbo Edition on the 13B engine intended to energy the 3rd-era RX-7 launched in late 1991. Each individual rotor on 13B-REW has one combustion chamber quantity of 654cc. With two rotors, the whole displacement was 1308cc. Excellent match for a Mazda swap or substitution task. About VehicleHistory.com https://zanenqwre.thelateblog.com/30294548/the-greatest-guide-to-rx7-motor