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      04-23-2010, 11:12 PM   #69
Alekshop
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Drives: E30 M3 l E46 M3 l GT4 l 991 RS
Join Date: Nov 2009
Location: Bay Area

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Today we did side-by-side comparison of Slip-On and Evolution systems. You can definitely hear the difference, but it is not much louder.

Stay tuned for a video clip