Thread: 1M midpipes v N55 midpipes
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      04-08-2012, 12:58 PM   #136
Balaclava
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Drives: 1M for fun, 330xd for winter
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Might be a newbie question, but when you install the N55 mid pipe, does the absence of the stock secondary cats generate any diagnostic errors? Also, any ideas how this mod affects the results of emission tests?
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