i put a cone on my saff when i first got my saff and it made it feel unresponsive to me.im an airbox fan myself.i have mine drilled at the lower section of the front and up the underneath where it sits on the inner wing,plus i have the centre light out of my quads for airflow.

plus if cones are so good why didnt the 500odd bhp touring cars run them?
and i much prefer the look in the engine bay of the box