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      08-15-2012, 05:30 PM   #49
GTM_Challenge
 
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Drives: E92 M3,X5M,F30 335
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Just an update: We are currently road testing our down pipe with high flow cat in combination with our catback. So far we have about 300-350 miles on the car and no check engine light even... Crossing our fingers at the moment that we may not need an ECU flash to trick the car with our high flow cat version.

The Catless downpipe will need ECU flash or another work around to get rid of the O2 sensor error.

Last edited by GTM_Challenge; 08-15-2012 at 05:44 PM.
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