Quote:
Originally Posted by e39_touring
Everything bolted up perfectly, and I'm enjoying about 10% better mpg and what feels about the same increase in power.
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Do you have data to back that up? Nothing about intake and exhaust mods should ever change MPG in gasoline engines. Power yes, mpg no. That's not absolutely always the case, but it's so rare that I'm always skeptical unless there are fuel logs showing it to be the case. (Not dash readings)