i purchased billet filter with stainless steel mesh filters 35u@ absolute and flows 1.9 gpm@ 1 psid of restriction with 90 wt oil.i got these from k&p engineering they sell all kinds of filters for auto, bikes,atv boats their auto site is under construction...there is a great difference in engine performance imho!!! i use this on my 98 ford crown vic replaces the fl820s..s-17 is the part number..i got these at 3r automotive k-pak racing they are going to use these in there scca racing cars team..... another company is trufilter the mesh is the same size and all the specs. accept the case is a bit bigger...i like the k&p.. they have fins to cool the oil...