You can use the standard airbox, but you need to modify and relocate it.
I fitted a larger, flared air entry pipe and shortened/flared the internal pipe.
And the supercharger whine is no more... :thumbup:
But not sure if it will stay this way. Found a way to battle the whine AND have a big intake filter => Harrop charger. 😃
(Maybe I will use the Cobalt-SS LSJ intake box, as that is big with a round filter and should be a very easy fit.)