I really doubt it, but I am not to sure.
I had an inccident with my twin pipes on my XCSP where they were dinted in, about the size of a soft ball. I was able to fix mine by cutting a hole on the oposite side of the pipe form the dint and then push it out. from the top it looks like nothing had ever happened to them, but if you turn it over there is the welds and damaged chrome underneath that no one sees. There are lots of other ways to go about fixing them as well, but this one just worked out great for me. I have yet to test and see if they both still work the same, but I would imagine that nothing has changed from the fix inside to affect the tuning of the pipe.
'06 Fusion 700 0 miles just bought it
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