fmf vs rossier

[250r4life]

so my buddy bought an 03 raptor on ebay today, and we are driving up to vegas to buy it tomorrow... the bike came with two pipes- an fmf and a rossier... both come with header pipes as well... anybody familiar with these pipes? im familiar with yoshi and hmf, but neither of these... what are their designed power characteristics, and which would be best suited for what purposes?

thanks in advance

[4dgs6m3]

would you wanna sell one of those headers?

[250r4life]

already been sold... sorry... nobody has experience with these pipes?