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      06-11-2009, 06:50 PM   #8
scottp999
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Drives: 4runner SR5
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2007 BMW 335  [9.00]
Can you clarify? Which cats did you remove? You should only throw codes from cat removal if you cut them out of the downpipes. I have not ever heard of anyone cutting cats out of the stock DP's.

The 2 DP's further down the exhaust system can be removed and will not throw codes since the o2 sensors are up closer to the engine on the downpipes.
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