Powerbond 10% underdrive pulley?
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Has anybody tried this product. What kind of #'s did you gain from it and did you feel a difference at all? And can you use stock belts?
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Do you have an upgraded stereo system or unusually large electrical loads? If not, you should be fine. Tons of people do 25% underdrive pulleys with no problems. You could always rasie your idle a bit if you do have problems.