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are these the same as the euro M3 MAF or the 540 MAF? I can buy two for the price of one dinan unit and I'm wondering why I haven't heard of anyone doing this yet.
 

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are these the same as the euro M3 MAF or the 540 MAF? I can buy two for the price of one dinan unit and I'm wondering why I haven't heard of anyone doing this yet.
not sure of the diameter of the 540 or euro m3 unit. I'm sure one of us with dinan mafs could measure them, if it hasn't been done already. Main issue is you will need software for them to work properly.
Larger mafs and stock software will usually result in ses lights and limp home mode under wot (at least that is what my car did when i had the emissions dme reflash done, and had to live with bmw software for a few days.)

By themselves, mafs are worth little hp gains, you need the rest of the intake and exhaust system opened up to see any gains.
 
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