K&N Performance Oil Filter for '03-10 Focus 2.3L/2.0L Duratec

Keep your engine free from contaminants as small as 10 microns with this K&N Performance Gold oil filter. It uses a resin-impregnated filter media to provide maximum filtering, and an inner core to lend extra structural support to the filter, preventing filter collapse. Plus, it has an anti-drainback valve that eliminates dry starts and prevents oil from draining back into the crankcase during engine shutdown. And it's all protected by a heavy duty outer shell that guards against rock and stone damage and provides over 550 psi hydrostatic burst strength.