A twin-turbocharged version of the 13B, the 13B-REW, became famous for its high output and low weight. The twin Hitachi HT-12 turbos were operated sequentially, with the primary providing boost until 4,500 RPM, and the secondary coming online afterwards. Output eventually reached, and may have exceeded, Japan's "maximum" of 280 hp (208 kW) for the final revision used in the series 8 Mazda RX-7.

Applications:

• 1992–1995 Mazda RX-7, 255 hp (190 kW)
• 1996–1998 Mazda RX-7, 265 hp (197 kW)
• 1999–2002 Mazda RX-7, 280 hp (208 kW)