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Power Pulley Kit Differences (Z4 M vs E46 M3)
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07-30-2019, 03:05 PM
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Michael9218
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Drives: 2007 Z4 M Coupe
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They claim it frees up some power. I didn't verify it so can't say. Did too many things at once.
Track only, can't hurt and can sure help (underdriving the powersteering should be a good thing for the pumps longevity).
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