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A MAF or mass air flow sensor, tells the engine how much air is coming into the intake so the engine can make the proper ajustments for the fuel delivery to be within the proper air/fuel mixture. Now by upgrading the MAF sensor you can see a small increase due to the new one being less restrictive and having a higher CFM rating, BUT they only see a diffence if you also have a less restrictive exhaust and or ported heads to add to the effect of more CFM and air flow.

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15y ago
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Q: Do mass air flow sensor increase horsepower?
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