Russ, when I rebuilt my up pipes for my Banks setup I ended up using 2x Walker 31885 flanges I got from Summit which are meant for 2.25" pipe and 4" bolt centers. They are bent up the opposite way with the tapered part and folded over edges being the same way, but it fit just fine up to the manifolds. I die grinded the holes out a bit just in case, but I think they would fit w/o mods to begin with. Hope this helps.