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      08-31-2011, 11:02 PM   #42
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Drives: E90 M3 6MT
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Originally Posted by ktan23 View Post
ok cool do you think if you don't put ALL the fiberglass back it would be louder? and did you get any engine codes after the mod?
1. It will sound like shit! the packing is to help the exhaust not sound like a tin can.

2. No engine codes. The only way you will get CEL is from removing primary cats. The sensors are only before and right after the primaries.

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