noticed the big o-ring I took out has a flat profile, the new one is round (and thicker)...wonder if the flat profile items are original?
managed to get it apart very easily with a 10 & 12mm spanners doubled on a T60, with 2ft pipe (the spanners were $1 Supercheap items
I estimate this was no more than 100ftlbs
Ford Z9 filter is nearly double OEM volume, (and cheaper)