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Old 07-20-2010, 11:39 PM   #28
BMW Tuner
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Join Date: Mar 2010
Location: Ottawa
Posts: 919
It's not a matter of backing anything up it's more of a why would you run 450whp with shit stock brakes, stock open diff, stock drive shaft that will break, the life time fluid is no good and will break down in the tranny and diff when you start pushing the car, upgraded fuel pump is a given for the size of injectors you will need for 450whp

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