What is this for?

[Brett]

Looks like it was never attatched properly in the first place.  Just push the pipe back on and adjust the clip into position.  It would be a shame for you to accidentally suck a few solid bits and bobs into the intake, that can lead to a sense of hunour failure! :yes

[Trevrx]

Agreed,  I have the same filter, you\'re sucking in unfiltered air thru that hole,  push pipe back on.  Your heat shield looks a bit temporary mate ;-)

[Jake]

I\'ll sort that out tonight, cheers guys.  Yeah that heat shield was a bit suspect.  Thats an old photo, it\'s since been removed.  I\'ve got a sheet of aluminium and I\'ve going to make up a proper one as soon as I get round to it.