I called UUC not to long ago. They said they made a pulley kit for the E60 525/530 but there wasnt any performance gains. Reason for this was because the e60 has an electric water pump. He also said this was the reason many companys released pulley kits and discontinued the items.
I dont know how true is this.....
Ravie

 

the uuc guys know what they are talking about, they are very renowned with the 3 series guys. They make top of the line products and back up all there stuff, if you guys are looking for pulley kits make sure not to buy any kits that will change the alternator pulley. Changing the alternator pulley is bad news to much of our cars things are electronic that you don't wantt to run the risk of not cranking the alternator enough for the vehicles electricity consumption.

http://www.rogueengineering.com/Merchant2/...Category_Code=P

May want to try rogue engineering another good company not sure if they make one for non M e60

 

Can anyone confirm that the UCC belts will work on my 04 530i, also is it easy to install?

 

call uuc they are very knowledgable guys there.

 

Alright, thanks. Also, all I need is the water pump and power steering belts, right?

 

yeah you don't want to mess with the alternator pump due to all the electrical components in our cars.