I recently purchased a used SLP pipe and can, and am wondering about the clamps for the heat shield. It looks like from the pics on SLP website, that there are 3 clamps, but I only have two installed. Do I need all 3? The other question is, how tight do the clamps need to be? Mine were pretty loose. Not sure if there needs to be room for expansion or not. Thanks in advance for the help 
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