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Old 10-23-2012, 09:43 PM   #11
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Join Date: Aug 2002
Location: NJ
Posts: 970
My Ride: 02 330i
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there is no performance difference. i had a regular 330 exhaust before this one, i would say it sounds slightly different. I recently put the ikon on my car and to be honest i think the zhp sounds like the ikon just not as much bass
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