yzf450 header

First, just wanna say thanks to everyone. So many people have made my change to 4 strokes easier. Now my question. The header on my 03 yz450f is jacked. Will a header from an '04 yz250f work? I know this sounds stupid, I would imagine that the 450's header is bigger, but a guy at the track actually said it would work. Thanks again

Hi, to my knowledge at least the diameter for the canister is larger on 450 header and filling up the gap is gonna give leaking troubles if u use 250 header. Can somebody confirm?

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