The 13B-DEI was turbocharged in 1987. It features the newer four-injector fuel injection of the 6PI engine, but lacks that engine's eponymous variable intake system. The twin-scroll turbocharger is fed with a two-stage valve to reduce turbo lag. Output is way up at 185 hp (138 kW) at 6500 rpm and 183 ft·lbf (248 N·m) at 3500 rpm.

Applications:

• 1986–1991 Mazda HC Luce Turbo-II, 185 hp (138 kW)
• 1987–1988 Mazda FC RX-7 Turbo-II, 185 hp (138 kW)
• 1989–1991 Mazda FC RX-7 Turbo-II, 200 hp (147 kW)