Your vehicle deserves only genuine OEM Ford parts and accessories. To ensure reliability, purchase Ford part # 6S4Z-9F491-A Valve - Exhaust Air Supply Check with base parts number 9F491. It is sometimes referred to as Lincoln Diverter Valve, Lincoln Secondary Air Injection Check Valve. Our Ford parts and accessories are expedited directly from authorized Ford dealers strategically located all across the U.S. and are backed by the manufacturer's 12 month, 12,000 mile warranty. OEM Ford parts are the best for restoring your vehicle to factory condition performance. This part fits specific Lincoln MKZ, Zephyr models.
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