OK guys, i need some serious opinions on underdrive pullies. stedda of course. I have been going back and forth about getting them for a long time now. The only reason i have'nt is because of the cons that i have heard ex: dimming lights cooling issues. I drive the car everyday in the summer and i don't want it to heat up or my ac not blow very cold if i'm sitting in traffic on a hot summer day. Has anybody had any of these problems? And are the pullies really worth it?