
03-13-2008, 04:16 PM
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CC Member
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Join Date: Mar 2003
Location: Fresno,
Ca
Cobra Make, Engine: Kirkham 427
Posts: 140
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Not Ranked
underdrive/overdrive pulley
I see threads on these pulleys but i dont know what is over or underdrive. How is this calculated? Is it a ratio or a size? Thanks
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