That rattle sound, Does it come from the actually bars themsleves clanking together? Or does it come from the actual joints that connect at the ends? If it is from the bars themselves clanking together you can dynamat the one bar. Why dynamat two bars when its only from one clanking against the other?
How to dynamat it? Thats the easy part. Just cut it in long sections with a width about 2 inches. You can get a sheet of dynamat for like 15-20 bucks depends on where you go.
You could possibly take the cheap mans way out, by finding a old section of carpet use a light coating of spray glue and place it there.
Hope it helps.....
