The engine cover wont fit back on as it's connected directly to the intake. It's an engine cover AND an airbox/filter in one.

I don't think that metal tube thing is a big deal, doesn't mention anything in the instructions, and it's got an open portion on the bottom of it anyway, as u cansee from the pic, so if it is connected there's still free air going into it
 
ok cheers mate, so is there much difference in sound?? i know i wont get any power increase just looking for better sound as its only a 1.2
 
There is quite a difference in sound yeah, a decent bit louder and sounds more meaty :)