could be the twin-turbo Edition of the 13B engine meant to electricity the 3rd-era RX-seven launched in late 1991. Just about every rotor on 13B-REW has just one combustion chamber quantity of 654cc. With two rotors, the entire displacement was 1308cc. Great suit for just a Mazda swap or substitute task.The new Renesis engine was nonetheless a 1.3L