The third-gen Mazda RX-7 came with a twin-turbo 1.3 L 13B-REW two-rotor. However JT Performance’s RX-7 has double the displacement and rotors. The red coupe is now powered by a naturally aspirated 2.6 L 26B four-rotor. The motor features peripheral porting and individual throttle bodies. Listen to the motor scream at the dyno and several events in the videos below.
Source: JT Performance, Lars Mars Cars, and Gumbal