Gearbox adapter CNC made from ultra-durable 2017a duralumin then hand finished High precision and fit guaranteed Motor: Toyota 1UZ / 3UZ Gearbox: Mazda RX-8, 5 & 6 speed Gearbox adapter CNC made with ultra Durable 2017a duralumin, then hand finished. High precision and fit guaranteed. Engine: Toyota 1UZ / 3UZ Gearbox: Mazda RX-8, 5 and 6 speed gears.