The MAF on most M96 engines SUCK plain and simple.
My Dad's 01' 996 c2 blew a MAF stock in 30k
My 99' 986 blew one at 55k with a K & N
Look around on Porsche forums,there are accounts of them failing left and right,stock or modified intake set-ups doesn't matter.
THEY BLOW ANYWAYS SO GIVE THEM A REASON TO BLOW!
About the Evo set up,they are both oil and paper based cone filters hooked up to them. I called Evo and they said their system is oil based but when I went to a shop around that was selling them it was the same exact Evo set up with a paper cone filter.
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-99' Zenith Blue 5-spd...didn't agree with a center divider on the freeway
-01' S Orient Red Metallic 6-spd...money pit...sold to buy a house