The K&N filter (HP-2004) was the same size as the Motorcraft filter (FL200). The threads were the same as well and the filter fit perfectly. As far as the K&N harming the Zetec engine doesn't make sense. If anything I would think it would only help due to its better filtering and stronger construction. Anyway, let me know if there are any proven issues with using this filter and I won't use it next time.

ZetecRacing: this is the filter you have been using for the past 2 years right? I found an old post stating that you use the K&N 2004 oil filter and there were no problems. Thanks!


1997 Contour GL Sport ATX
Zetec/2.0 liter

K&N High Flow Air Filter
Mobil 1 SuperSyn 5W-30
Mobil 1 Oil Filter (M1-204)
Fram Sure Drain System
Ford Motorsport 9mm Racing Wires
Recontented Fog Lights, Rear Dome Light, Underhood Courtesy Light, Glove Compartment Light
Pirelli HPs
Kenwood in-dash CD player
Infinity 5752cf speakers
World Champion New England Patriots Fan for Life!

Wife's Car:
1998 Contour SE ATX
Duratec/2.5 liter

Mobil 1 SuperSyn 5W-30
Mobil 1 Oil Filter (M1-210)