Alterator pulley question
 

mmm odd question here..

but is it possible to swap the pulley off of a s4 alt onto a s5 alt?

umm...why would you want to?

i have a dual pulley and i want to sell it to my friend.. who has a s4.. and wants the pulley for his car that doesn't have smog pump.

ooooh...yea, the pullies should be the same inner diameter, so it should pop right on, iirc (someone correct me if im wrong)

Same pulley sizes. They can be swapped.