nytrdr24
+1y
you need to be careful of overtightening the header studs, if not to factory specs, you'll end up warping the flange, and it won't seal correctly...only fix there is getting a machine shop to plane it flat again, and that would probably cost as much as a new header......
what part of the header is hitting? the collector, or the extension that has the 02 bung on it.....as long as it isn't the collector, you could carry it to an exhaust shop, and they could bend a piece to go around the bellhousing, and weld an 02 bung on it to replace the piece that came with the header.....