I was the one who showed that the filter number for the contour is cross referenced on the box and in the K&N filter book.
I broke 2 oil filter wrenches before I said f**K it and stuck a flat blade screwdriver into the filter to get the original one off.
is it worth it I think so do I see peformance gains NO it's a frickin' oil filter. does my oil stay clean for the most part yes.

2003 Subaru WRX some mods Even if you don't have the answer, you certainly have to admire the problem. aka ZetecRacing