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BMW 3-Series (E90 E92) Forum > BMW E90/E92/E93 3-series General Forums > General E90 Sedan / E91 Wagon / E92 Coupe / E93 Cabrio > no cats, no res, no muffler



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      07-07-2009, 12:37 PM   #1
mastermayhm
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no cats, no res, no muffler

what kinda errors would i get if i straight pipe right outta the headers to a magnaflow muffler?

or can i take duals out of the cats instead of a single n run those to two mufflers?
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      07-07-2009, 12:39 PM   #2
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You'd be fine. You just need 02 sims. Tons of people are running catless down pipes. From what I understand the 02 sensors are in the down pipes and only pertain to the first set of cats. Anything after the down pipes can be changed without throwing codes or needing sims.
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      07-07-2009, 12:40 PM   #3
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I deleted my secondary cats and they were fine. As long as you had 02 sims for the primaries, you'd be fine.
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      07-07-2009, 01:08 PM   #4
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perfect, im getting on that tonight, Ill post sound clips soon too! Thank youuu
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      07-07-2009, 01:10 PM   #5
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Sweet I want to see how it turns out!
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