Ahh, just joined to ask about this myself. Daughters 2012 KA has a nasty vibration sometimes and I
have tracked it down to the airbox and that pipe. The orginal rubbers on the airbox have been trashed
over the years and i think its mounted with some rubbers that are harder than the original mounting
system and causes vibration with that pipe, there appears to be little flex between the parts causing
the vibration. Cannot find the rubbers/mountings for sale on their own though, just the complete
airbox housing for almost £180.