FYI, from what I have read, and I think with backup by RETed, that MAF gadget is useless for our cars. Something about the way our ECU's deal with the MAF signal.
Also, the MAF is a restriction on the intake if you are trying to make some good HP. And you can spend $400 elsewhere that will net you horsepower even with the stock MAF.
EDIT: even if it is $260, I can think of better ways to make power
