Thread: N54 Backfiring?
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      07-11-2011, 07:25 PM   #12
IGoFast1589
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Drives: 08 135i
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No myth, Dackel. It has it's benefits, but the downsides are clearly minimally worse gas mileage and your not making as much power as you can that way. Although I would argue reliability over peak HP any day. Too many factors that go into ECU tuning for this topic right now.
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