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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > NA Engine (non-turbo) / Drivetrain / Exhaust Modifications > Bought these Ebay headers. Quality?



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      10-25-2018, 10:17 PM   #45
hassmaschine
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Yeah, I've strongly considered it. But its just too risky IMO. Also I got my S54 ITBs for a song...
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      01-27-2019, 11:09 AM   #46
breakingpoint
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I suspect the location of the oxygen sensors wouldn't be of major importance, with a tune? The point of the double oxygen sensors and catalysers is to measure the delta over the catalyser, am I right?

So in the case where the catalysers are removed, the whole point of double oxygen sensor is not applicable? Since there will be no delta per cilinder bank?
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