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What are the drawbacks of installing underdrive pulleys? What is sacrificed in return for more rwhp?
 

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No idea, I can't tell any diff. w/ the Steeda ones on, but 4 rwhp… I don't think you'll feel it anyhow.
 

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Power gain is minimal, 8 RWHPs for me... It revs better...

A/C is even lazier... but only while not driving, like in a traffic jam...
 
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