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.