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ok, so i have been searching about the under drive pulleys. from what i have read they reduce the percentage of the stock pulley about 25% and save weight. this also effects how the ac, steering, and charging system run, but it increases what is getting to the ground. in texas i don't want to be sitting in traffic sweating because my ac is not working up to par during the 7 hot months a year. is the reason for change to a pulley to save the weight from the heavy stock one? or is the reduction in size the most important part? if not, is there a pulley out there that is the same size as stock but a good amount lighter that will also help with allowing the car to rev faster but not affect the effectiveness of the ac, charging, and sterring system? thanks for your help, Tyler