down pipes of a 600 to fit a 400

[fzrwayne]

i was lookin at puting some fzr600 downpipes on my 400 exup. my point is will the pipes fit in the head n on my 400 and the exup valve on mine it will not have oneon the 600 pipes so whats te crack lads what you think will thay fit? i dont wont to go and spend good money on them and thay dont fit.
i askd this elswher and i dint get the respons i was realy lookn for.
thanks