alternator pulley

kingcobra9450

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I just bought my new alternator from autozone and the pulley is a different size from whats on the car now. will the size difference matter since the tensioner is self adjusting?
 

Red98CobraStang

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Well since you have U/D pullies on your car, I assume the pulley from the autozone ALT is smaller in diameter?

I'd run the STOCK pulley (which is on the new autozone ALT)
 

98 svt

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Exactly what he said.
Your sig says you have UD pulleys, so your pulley is definitely different size than the Auto Zone one.
I have pulleys too, and i'm going back to the stock alt pulley too.
 

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