Hi, im new to this forum so I thought i would try a question. I have an 85 se that i just put a rb cat replacement pipe and muffler on. I had'nt noticed before that the pipe into the main cat that connects to the air pump had rusted away and was gone. All that is hanging from the pump is a rubber hose with about a half inch diameter. The car has always run fine. Is there a check valve missing too? What about the 5th and 6th ports? Any ideas? thanks.