2004 550 spyder MAF housing
 

I need to know the part number and inside diameter of the 2004 550 spyder MAF housing! It's a hard one but I bet someone on here knows the answer!

The special edition cars used the same 987 MAF housing and air box as the 987 cars that would come in the following model year.

Airbox part 987 110 021 00
MAF 987 606 125 00

Todd

Thanks Todd.....not the answer I wanted but now I know.....I will likely have to have specific fuel map changes to use the nice 987 airbox/MAF assembly

I will check into it

Do you think you will need to change your fuel map? I would think the mapping would adjust itself for the increased airflow, similar to driving through Death Vally (-282') to driving over the Rocky Mountains (+12,000'). I know we're talking density vs volume but it should be the same difference...right?

the computer can adjust to changed airflow - the MAF is the tool it uses. note, however, that the housing within which the MAF sits is part of that tool (airflow past sensor x area of housing = total airflow). modify the tool without telling the computer and the readings are off.

I am not entirely sure as I have extremely limited knowledge of ECU tunning and adaptation capabilities.

You have put forth a valid case for adaptation for sure; I hadn't thought of this before. I will have to think about it. My first though is that air density does not affect the sensor to a considerable degree where as velocity would. As far a recall you are trying to cool a hotwire in there.

As Todd mentioned, you could be pushing out of the proper fuel trim envelope