My OBX EL headers showed up tonight. They're probably the crappiest made car part I've ever bought. One of the biggest problems is that none of the actual tubes mates cleanly to any of the flanges. The worst offenders are the primaries where they mate to the dual-port engine block flanges. They're offset and the pipes are considerably bigger than the holes in the flanges. Placing a Subaru gasket on the flange shows that the holes in the OBX flange are WAY smaller than the holes in the gasket.
Is it worth dremeling out the holes in the flanges to make a smooth transition to the pipe? Won't this just leave a sharp transition from the block to the flange? Is it worth cleaning up the edges between the header and the intermediate pipe and the intermediate pipe and the midpipe?