Could be the twin-turbo Model in the 13B engine designed to energy the 3rd-era RX-seven introduced in late 1991. Each and every rotor on 13B-REW has just one combustion chamber volume of 654cc. With two rotors, the overall displacement was 1308cc. Excellent match for a Mazda swap or substitute challenge. https://rx7-motor36791.widblog.com/93662923/the-13b-turbo-2-engine-for-sale-diaries