Gearbox adapter. CNC technology made of ultra-durable 2017a duralumin, then hand finished. High precision and fit guaranteed. Engine: Toyota 1JZ / 2JZ. Gearbox: BMW M50, M52, M57, M57N. Gearbox adapter. 2017a duralumin, then hand finished. Guaranteed high precision and fit. Engine: Toyota 1JZ / 2JZ Gearbox: BMW M50, M52, M57, M57N