-JZ to 300ZX/350Z/370Z -1UZ to KA24DE/SR20DET/300ZX/350Z/370Z
This is a billet T6061 aluminum adapter that allows you to take the over-sized Toyota crank boss, and it adapts it down to allow the Nissan input shaft to fit properly inside of it.
It comes with a serviceable bushing for all Nissan Input shafts. *I