Has anyone here fitted a new GP2 to an 08- 1000RR? It seems as though the juncture between the downpipes collector and the Arrow link pipe is quite loose as if it needs a gasket. Does the original Honda gasket fit this or does it not need one? There seems to be a difference in pipe sizes here but I have not measured it to verify that. I haven't checked if it is blowing and it doesn't sound like it although you'd be hard pushed to notice over the noise!