I phoned lingenfelter and....
Well when one does the egr mod they talke and cut the pipe off flush so as to not interfer with air flow. Been a while since I had an ls6 intake but as I remember you have a circular section in that sqaure section on the intake right?
just cut out the circle stick the pipe in and then jb weld it or they make a nice epoxy paste that will work awesome as well.

Doesnt need to be over engineered.





