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      03-02-2013, 02:23 AM   #14
M3takesNYC
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Drives: m3
Join Date: Feb 2013
Location: NYC

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I always wondered why they went to MAP only on the S65. If you give credence to Steve Dinan who has a video about how the M5 airboxes were undersized and had not enough flow. THeir intake for the M5 not only changes the box but replaces the MAF saying the one that is OEM was not able to handle the flow really needed to give the engine the air it really needed.

He said they fixed this problem in the M3 which I have to agree in terms of the square inches of filter of the hexagonal cone is easily as big as the 2 flat filters in the M5. However the M3 has 2 less cylinders and a litre less to provide air for.
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