Focus Fanatics - View Single Post - Zetec alternator with light weight AEM pulley
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Old 03-28-2011, 10:04 PM   #10
oblivion2kx
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Join Date: Jan 2009
Fan#: 61764
Location: Rutherford, NJ
What I Drive: 2004 Twighlight Blue 2.3l ZX5

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AEM pulley weight = 8 Ounces

Stock pulley weight = 10 pounds

You get noticeable gains if you have done header, exhaust, intake, tune, ect. About 5 to 8hp
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A few years ago, I went to the gym for several months and lost 30 pounds. That must be worth about 1% more fuel economy in the city.
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