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      03-11-2011, 05:38 PM   #370
Imperator
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Drives: 2010 E92 335i
Join Date: Mar 2010
Location: Plano, Texas

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Um, I'm pretty sure the stock 335i exhaust has a crossover in the system just after the secondary cats, upstream from the mufflers. There's another crossover built into the mufflers to accommodate the bypass valve in the left muffler outlet.