just a heads up on that last post.... that is for filter info only, not what type of filter you can run.... just info on filter's, who actually makes them, like the Mobil 1, looks like a champion filter on the inside..... so it probably is.... this is just to help you decide what brand is going to be the best as far as filtration and flow, quality.... that's all... you still need to size right....
what i did, was get a stock filter, ask your parts guy to look as several larger filters and match up the o-rings, as long as the threads are the same, bingo. my filter actually seals on the outside ring of the filter mount, that was actually supposed to be there to protect the edges of the smaller filter, which sits inside that ring. so my filter doesn't screw in as far, but it doesn't affect the filter in anyway. I don't know of a larger filter that will fit, so you could use the XG8 as a cross-referance.
hope that helps....