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#4: 02-28-2013, 11:23 PM
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Title: Flying W00t Monkey
Location: Salt Lake City, Utah
Car: 93 SS, 03 WRX 205/22T
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From what I have gathered our stock pulleys are not a true harmonic balancer. The rubber bit between the two halves of the pulley are there to join the two bits and because of different varying manufacturing conditions.