E46 m3 k&n panel filter
Bought it used and never installed it. $25 including shipping.
I don't know if it will fit non-m3's or not.
Clarkson on the 1M: "There's a straight six engine at the front, a manual gearbox in the middle, and drive goes to the back. That's page 1, chapter 1 from the petrosexual handbook."