Can anyone explain to me the difference between these two because after reading the only thing that I found was the price tag and the company. If anyone has experience with one or both any feedback would be appreciated.
AEM makes a crank pulley? i thought they made alternator pulleys?

Im a Xbox 360 fanboy...and damn proud of it!!
I could have sworn I saw an AEM Crank pulley...Maybe I was haluicanating(sp)...let me check...
The one I was looking at was an alternator pulley..however looking at their site..one of their true power pullies looks way to big to be an alternator pulley...I could be wrong..Ill just shut my mouth from now on =p...