I am going to get an underive pulley and a superchip for my 3.9 and am not sure what brand to go with on the pulley. So far I have found these: http://store.summitracing.com/partde...5&autoview=sku

http://www.autotrucktoys.com/dodge_d...8358C2118.aspx

I think that the one from auto specialties is only a crankshaft pulley and the ones from JET include a crankshaft, alternator, and possibly a waterpump pully. If the kit from JET will give me more power is it worth the extra 180 dollars? Also if anyone has bought pulleys from a different brand please lead me in the right direction.

 

I also found a kit from auto specialties

http://store.wpsracing.com/auspunstpuse7.html

 

if you use an underdrive pully wouldnt that slow down your fan too?