Thread: headers
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Old 03-10-2010, 03:05 PM   #9
lllSupra
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Join Date: Nov 2009
Location: Kansas City
Posts: 2,524
My Ride: E46 330i
Th reason you get the CEL is because the O2 sensors realize there is no catalytic converters. These headers have no cats so they WILL throw a code... Simple as that.
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