I too am studying this thread intently as the pulley bearing on my rescue srt alternator is whining loudly. I ordered the one from rokauto that supposedly fits either valeo or bosch. Called the stealership and read them my VIn and they said both of my srt's have Valeo alternators. I guess I'll find out when we get under it to replace it. I'll refresh the bearings in the old one for a spare....Chuck...call me, I lost your number, had to replace my phone....Peace