indeed that is the paper filters for $5

I wouldn't recommend this paper filter. I've tried them before, I had to change this paper filter after maybe 1000 miles cause it looked like it was going to fall apart.

My recommendation is the Mann HU718/5X Fleeced Filter or any of these
Mahle OX345D
Mann HU718/5x.
Purolator L25277
NAPA 7078.

On Amazon it will say it doesn't fit the XF but it does.
http://www.amazon.com/Mann-Filter-HU-718-Metal-Free-Filter/dp/B001DRP9G4/ref=au_pf_pfg_s?ie=UTF8&Model=Crossfire|2422&n=156 84181&s=automotive&Make=Chrysler|39&Year=2004|2004 &newCar=1&carId=001