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Old 01-28-2013, 12:43 PM   #2
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Join Date: Aug 2009
Location: San Diego
Posts: 10,118
My Ride: F80 M3
Power for the non-m without adding F/I would be most noticed with headers, tune, maintenance. The fastest my car ever was, was with headers, stock exhaust, AA tune, and great maintenance. Now, you can get intakes and all that crap, but the intake in our cars is fantastic, and all other intakes usually gain little to no power, or even lose power.
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