is the twin-turbo version on the 13B engine meant to energy the 3rd-era RX-seven released in late 1991. Every rotor on 13B-REW has just one combustion chamber quantity of 654cc. With two rotors, the overall displacement was 1308cc. Great in good shape for any Mazda swap or substitute job.Connected:honda b18 enginehonda k20 enginehonda d16 enginehon