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Old 03-02-2011, 04:32 PM   #13
blk325i
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Join Date: Feb 2006
Location: kitchener
Posts: 536
Quote:
Originally Posted by richie_s999 View Post
5 to 10, also depends on other mods, feels nice with the tune I have in my car. Midrange feels quite good
u can't actually believe you gain 5-10 hp... especially with nice metal piping that'll warm that air up REAL good
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