Riding the shirttails of the other comments... I have had a UD pulley on my 04 and 06 SRT-10's as well as my 06 and 08 Viper's and never had an issue. I'm not positive but I think most of the UD pulleys being offered for the GenIII's, GenIV's and GenV's are the same size, if so you should be safe. I think most people that mention that they have charging issues may have simply had a battery that was at the end of its life cycle, in-turn the UD pulley was the easiest to point the finger at.