The problem with that is he is not using a stock Subaru flange at both ends. If you plan to cut his off and weld on a subaru flange i dont think it will work. Mine looked totally different for it to fit. Most exhaust shops do NOT tig weld, the OP in that thread is Tig welding those flanges which is correct. You will likely have to take it to a Fab shop that builds race exhaust or like wise. They will likely charge you out the a$$ to weld it and make a down pipe. In the end you will be in it just as much as a up pipe and down pipe would cost for a true rotated kit. Or just buy the OBX kit for $250 and swap the flanges over, and also cut off the EWG pipe and real it back off. That has been done many times.