is the twin-turbo Model with the 13B engine created to energy the 3rd-era RX-seven launched in late 1991. Each rotor on 13B-REW has an individual combustion chamber quantity of 654cc. With two rotors, the entire displacement was 1308cc. Great suit for just a Mazda swap or substitute undertaking.Alan at Eleve Motors LLC is a great dude to work with,