The one pully which ypu posted a pic of a few posts back, that is the oul out of date pully which is causing a shqeel/cherp under hard acceleration or cold starts.
THe hudraulic pully assembly is the upto date one. This pully is a direct bolt in. All the hardware should be supplied, its just the fact of getting it all together correctly.
In your picture above, the #15 pully is your OEM pully. The long bolt that holds it on goes through the top of the alternator (removing this bolt wont affect your placement of your alt.) When doing this update it is much easyer to remove this pully, so just do it.
When ypur putting the updated pully in there is a small grove on part #4 that part #2 has to slide into or you cannot put the tensoner together. Once you slide both the pieces together your notice it.
Anymore questions feel free.