may be the twin-turbo version of your 13B engine intended to energy the 3rd-era RX-7 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. Perfect in shape to get a Mazda swap or substitution undertaking.JDM Engine Depot is a very pleased supplier of authe