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      11-30-2011, 10:24 PM   #3
Money2536
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Drives: ' 15 M3 | '14 GT3
Join Date: Feb 2010
Location: The Villages, FL

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Exhaust of your choice, ESS or Evolve Tune, Filter. This may be over budget and probably won't make more than 20 additional horsepower.

The main way to gain power is by removing the primary cats with a middle exhaust and software.