1JZ-GTE / 2JZ-GTE OEM accessory belt tensioner
Compare to the picture provided to confirm it matches the part you are looking to replace. Some of the dampened pulleys have been swapped and vice-versa.
Can be found on any variation of the 1JZ or 2JZ.
The first picture is of a non-dampened pulley, and the second is of a dampened pulley.