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      09-03-2012, 02:29 AM   #10
DarylKZ4-30
DarylKZ4-30i
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Drives: 2009 BWM Z4 3.0i
Join Date: Sep 2012
Location: Duluth, Minnesota

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I have been trying to identify Horsepower performance kits for my 2009 Z4 sDrive3.0i, but also wondering if items like the GForce Performance kit really achieves what it advertises - 60hp, 3-7mpg and 30ft-lbs torque increases ....? Does anyone have any experience with these types of kits, whats the best and any effects on warranty ...? --- Daryl
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