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Old 10-25-2010, 05:52 PM   #173 (permalink)
PR370z
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Join Date: Jun 2010
Location: Puerto Rico
Posts: 108
Drives: 2008 BMW E60 M5
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Pulled the trigger today and got ERZ/CNT HFC's, the communication with Thomas (ERZ performance) was great and the price was great. Will let you guys know my opinion after I install them. How much of a HP increase should I expect with the stock exhaust? Also considering CNT CBE when it is available.
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