I had a cone filter on my 3.2 for an afternoon before I shipped it back for a refund. My butt test indicated from a loss of power on the low end to absolutely no improvement at all. It did, however, sounded real cooool. I ended up with just the K&N element with holes in the airbox. This setup actually improved 3rd and 4th gear acceleration while not affecting the others. This is, of course, according to my very unscientific butt test. Come to think of it, since it's such a nice day out today, I 'll go out and calibrate my butt
Paul in sunny merryland