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      03-16-2013, 02:35 PM   #9
Superfly_M3
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Drives: 2011 M3
Join Date: Sep 2011
Location: Toronto

Posts: 964
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The dyno shop should strap the car down for you. They have done this many times and should do it themselves. I don't know why you would want to take the risk and do it yourself.
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