i just installed my mpx downpipe to your o2 housing. i tried to align the flanges on the downpipe perfectly even with the flanges on your o2 housuing. i couln't seem to get it perfect so i just let the downpipe pull down on the flange too how gravity wanted it to sit and bolted it up.. would this slight misaligment, if it was not perfecty lined up on the inside(both 3" holes) do anything to performance. who knows maybe the holes are ligned up perfect but if they werent ,would there, or could there be enough of a lip on the inside to hurt performance? Or with all the play and adjustmet the flanges give you to shift and move around, the holes will always line up good in the middle no matter what?