Originally posted by MentalGoop:
What's the part #? When I seach for products at K&N's site they only list an Oil Filter for the 2.5L.

try looking under focus or ZX2.... same motor and the above part number is correct.

2003 Subaru WRX some mods Even if you don't have the answer, you certainly have to admire the problem. aka ZetecRacing