The sixth generation 323/Familia (BG) was launched in 1989.

The four-wheel drive turbocharged Mazda 323 IV GT-X 4×4 (BG) featured viscous limited slip differentials and a turbocharged 1.8 L BP engine producing 185 hp (136 kw) and 236 Nm of torque.

The Mazda 323 IV GT-R 4×4 (BG) rally homologation version was added in 1992, producing 210 hp (154 kw) and featuring a number of enhancements over the GTX model: an aggressive front bumper, grill and bonnet vents, updated rear bumper, wheel flares, stiffer suspension and anti-roll bars with thicker cross members, and homologated five-stud wheel hubs with larger brakes. The interior was fitted with leather and suede seats, and had the option of replacing the cupholder with a 3 gauge cluster. In addition, the GTR has stronger connecting rods and pistons, larger oil squirters, larger nose crank, larger oil cooler, sodium filled valves, a baffled inlet manifold, larger injectors, removed boost cut, front-mounted intercooler, and an IHI VJ-23 ball bearing water-cooled turbocharger.

Source: Wikipedia