Yes they are a 2 speed fan but only if you have the fan control unit that comes with the car when you buy it. The fan by itself is only a single speed. It has a 3 pin connector on it.
One for POS
One for NEG.
The third pin is a signal wire to let the OEM fan control unit know that the fan is working. For us, the third pin is only good for hooking up a little light on the dash so you know it is running.
On a side note:
I hope you have upgraded you Alt. to at least a 130amp. This fan sucks up a lot of juice.
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