OK guys, to clarify... The flange on the supersprint headers is a perfect fit, the clearance under the engine was not correct so we had to modify the bend at the collection end. It took about 5 hours to re-manufacture the bend. (don't forget the few hours it took to take the engine out and re-install it) Supersprint is only a dealer for the header which is made in Italy by another manufacturer, so they have no way to modify the headers themselves.

They said they would make a call to the mfg. to make a perfectly fitting set if they had enough requests. But if you have a shop you can work with, you can do the same alterations I did...