It looks like it would require some modification to fit. You would either need to grind that flange off the MAF housing, or get a matching flange and short tube section to connect the CAI to.
It's important to mention that, without tuning, a larger MAF will probaby harm your engine. The ECU only sees a small cross-section of the air going through your intake, and calculates total flow based on the assumption that it's seeing a certain percent of the total area in the MAF housing. If you upgrade to a larger MAF housing, its calculations are off and your engine will be constantly lean. This is very bad, and it will almost certainly damage your engine over time. If you have an XCalibrator, order a new tune for it to go with this housing. If not, look elsewhere.
(PS: you will get some benefit from this mod, but you'll get much more "bang for your buck" elsewhere. Consider this once you already have cams, a header, full exhaust, etc
yeah, i should probably wait. i just have intake and exhaust. do you just have a flex-pipe or do you have a header + flex? i want upgrade my exhaust to a 2.5". i want a header and flex as well but the header's pretty expensive.
It bolted up to mine with no problem. IIRC, flex-pipes can be bolted up to the stock manifold on any PZEV Duratec. Non-PZEVs have a one-piece manifold and flex, so they need aftermarket headers in order to install flex-pipes.