I don't understand your question. The intake the car has now has nowt to do with what did/could have happened to your MAF.
Inspect the area I mentioned, maybe take a pic for us.
You want your MAF working correctly, not just for MPG.
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/// 2004 Silvergrey M3 · Coupe · 6MT · Slicktop · zero options
/// 2011 Jerez/Bamboo E90 M3 · DCT · Slicktop · IG: @na.s54
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