I've recently found that the "middle collector" on my 2004 RSV is seriously cracked (through the twisty~snakey rear pipe) and needs replacing. I'm finding that the 2006/07 collector is significantly cheaper than the 2004/05 part. But could they be that much different - after all the engine and frame are pretty much the same, aren't they? Has anyone tried fitting the later part? Just curious. Ta