Originally posted by morbid:
The MAF entrance is 84mm, but is reduced to about 70mm at the sampling tube (haven't yet measured this part myself.. going off other posts). The MAF exit opens back up to 76.5mm.



The inlet does start out at ~3.25" (83-84mm) but it tapers down to its true throughput size in about 3/4" of length.

The MAF's true size is 2.76" (70mm) of which the center .8" is blocked.
That leaves about 55mm of flow area around the center bar post.

This 70mm center portion then tapers back out to 2.95" (75mm) at the outlet.

The SVT MAF screen has an inner size of only 3.1" which is why is does not work with MAF adapters (or MAFs) larger then stock sizing.

2000 SVT #674 13.47 @ 102 - All Motor! It was not broke; Yet I fixed it anyway.