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BMW 3-Series (E90 E92) Forum
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GIAC Stage 2 Hardware Requirements Question
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12-12-2010, 06:18 PM | #67 |
Major
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Thanks, that's very encouraging. Do you know if he retained the stock exhaust and secondary cats? If so, are those also significantly restrictive or should one just concentrate on the DPs if prepping a car for GIAC S2?
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Appreciate
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