AP Exhaust 645430 Catalytic Converter

OE-Fit Catalytic Converter for Ford and Mercury

AP Exhaust 645430 is a Federal / EPA direct-fit catalytic converter built for exact OE dimensions and fitment. It uses a stainless steel body, a ceramic substrate, and a direct-fit flange layout to support proper exhaust connection on select Ford Explorer, Ford Explorer Sport Trac, and Mercury Mountaineer applications.

• Federal / EPA direct-fit catalytic converter
• Stainless steel body for exhaust system durability
• Ceramic substrate material
• 2-bolt loose flange inlet with spherical flare
• 2-bolt welded flange outlet with gasket stub
• 4 O2 sensor ports
• Overall length: 44.75 in.
• Outlet gasket and outlet hardware included

Fitment and Application Details

This AP Exhaust catalytic converter is engineered for direct replacement on 2006-2010 Ford Explorer, 2007-2010 Ford Explorer Sport Trac, and 2006-2010 Mercury Mountaineer models. AP Exhaust 645430 is built to OE dimensions to help maintain proper exhaust routing and sensor placement on the listed applications.

The converter uses AP Emissions Technologies manufacturing methods, including automated workstations, spinner welding equipment, and high-speed production lines, to support consistent construction and fitment. The ARISTO substrate chemistry is used to achieve efficient loading in a cost-conscious design. This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

What This Converter Helps Address

• Failed or restricted catalytic converter causing exhaust flow issues
• Check engine light concerns related to catalyst efficiency
• Exhaust odor or emissions-test failures tied to converter wear
• Fitment problems from a damaged or non-OE-style replacement converter
• Sensor placement issues on vehicles requiring multiple O2 ports

Installation Notes and Tips

Verify the inlet and outlet flange style, O2 sensor port count, and overall length before installation. This part uses a 2-bolt loose flange with spherical flare at the inlet and a 2-bolt welded flange with gasket stub at the outlet. Outlet gasket and outlet hardware are listed as included; inlet gasket and inlet hardware are not required or not supplied. Confirm emissions compliance for your vehicle and location before purchase, as this part is listed for Federal and California emissions applications but is not for sale or use on vehicles licensed in CA, CO, ME, or NY.

Quality Assurance

AP Exhaust builds this converter to OE dimensions using controlled manufacturing processes for consistent fitment and construction. The stainless steel body and ceramic substrate support a direct-fit replacement solution for the listed Ford and Mercury applications.