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So I learned from this thread that the tailpipe clamp is suppose to be loose enough for a bit of give of the pipe within the pipe. After repair my system I found I needed a longer clamp bolt to leave this clearance. I also noticed the pipe had been rubbing on the frame. I place a shim between the tailpipe and the frame and resealed and clamped the exhaust pipe to the manafold. This seemed to maintain clearance between tailpipe and frame.
I next checked a second vehicle to find both a tight clamp and tailpipe against the frame. I am concerned that after loosing the clamp bolt the the added give and rubbing against the frame will eventually wear a hole through the tailpipe. Is the front clamp intended to keep the tailpipe away from the frame rail? Should I make this change to my second A as well?