Hopefully, this photo will load so you can see it. If not, I'll try again.
What you are looking at is a gap between the BBK header and the pipe going to the side exhaust. There is a gap just like this on the other side. I have a feeling the header and the side exhaust are as close as they are going to get without some major bending work. I think this is what is causing my backfiring when I let up off the gas. Anyone know what to do about this?