Any opinions on which CAI is superior between:
K&N 57 Series:
(Why does the 57 series on Amazon (at the top of the screen) say it DOESNT fit the 2006 Ford Focus, yet, under "Product Features" it says it DOES???)
Otherwise, does anyone have any opinions on, or know anything about how the AEM Dual Chamber Intake works on a Ford Focus? Good? Not so good? Better than a traditional Cold Air Intake?