K&N Drop-In (E26051)
I am sure it doesn't make the same sound as the full intake kit, but it does free up some airflow and you can hear a more distinct spool up from the turbo. Also, this filter lets you keep the potection of the airbox and all the cool air from inside the bumper. The price isn't bad either.
Reviewed by: Andrew Young from old SupraSport website.