I had to trim some metal from the inner lip on the rear of my 1996 integ GSR clear 40's being lowered 3 inches.
I justed used a air hacksaw and trimmed it back to about 1/4 inch
of metal left till the lip and touched up the edge with paint and no more rubbage.
Good luck.
I will post some picks of my integ when i get some good ones taken.:thumbup: