Well, I restore Classic cars for a living and didn't have any trouble fitting it but I have the equipment and the know how to do so.
I did take me about 2 hours. I required no extra pipes, as I cut off the factory one shortened it and re clocked it.
If a professional tell you it is hard to weld it, they are not very good.
I did have to get a little creative with the tips but they fit and look stock.
It is a little louder around 2 - 3,000 rpm then I expected but it sounds good.
If I decide I like the sound, I am going to ceramic coat the whole thing except the tips.
Good luck with your project.