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The blower pulley is this one right above the yellow toyota logo...
More turns of the pulley per belt cycle means the blower rotors turn faster = more boost = more fun. Thus, you want smaller.
There are other pulleys guys swap out and someone else can speak to those, as I have no idea what they use.

More turns of the pulley per belt cycle means the blower rotors turn faster = more boost = more fun. Thus, you want smaller.
There are other pulleys guys swap out and someone else can speak to those, as I have no idea what they use.