I am interested in getting an Air Force One FIPK. Can anyone tell me if they are pleased with thiers. Can the air filter element be replaced. Is this filter an oil impregnated filter like the K&N. Is there a noticeable performance improvement. How does this setup pickup air from the fender well

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2000 F-150, XLT, SC, 5.4, 4X4, 355 LS, ORP, Black/Silver, class III, single CD, sliding glass, med. gray, keyless, elect. shift, engine date 8-18-99, Superchip. '93 Harley Fatboy Black & tons of chrome