AP Exhaust 641391 Catalytic Converter with Integrated Exhaust Manifold - Front Left

OE-Fit Catalytic Converter Manifold

AP Exhaust 641391 is a Federal / EPA direct-fit catalytic converter with integrated exhaust manifold built for precise OE-style fitment. It uses a stainless steel body, a ceramic substrate, and a 6-bolt welded inlet flange to support reliable exhaust sealing on select Ford, Mazda, and Mercury applications.

Fits 2009-2012 Ford Escape, front left, and also fits 2009-2011 Mazda Tribute and 2009-2011 Mercury Mariner in front left applications where listed in the fitment catalog. AP Exhaust 641391 is engineered to match original dimensions for straightforward replacement on the radiator side.

Key Features

• Part number: 641391
• Part type: catalytic converter with integrated exhaust manifold
• Federal / EPA direct-fit manifold design
• Stainless steel body for corrosion resistance
• Ceramic substrate material
• 6-bolt welded flange inlet
• 2-bolt welded flange with male ball outlet
• 1 O2 sensor port
• Inlet gasket included
• Outlet gasket not required

Detailed Description

AP Exhaust 641391 is built for direct replacement of the exhaust manifold and catalytic converter assembly on select 2009-2012 Ford Escape, 2009-2011 Mazda Tribute, and 2009-2011 Mercury Mariner vehicles. The stainless steel construction and OE-dimensioned layout support proper alignment, while the ceramic substrate is paired with AP Exhaust’s ARISTO substrate chemistry and modern manufacturing methods to help maintain consistent converter performance and fitment.

This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

Common Repair Uses

• Replacing a cracked or leaking exhaust manifold assembly
• Addressing catalytic converter efficiency-related fault codes
• Repairing exhaust leaks at the flange or gasket surface
• Restoring proper exhaust routing on front-left radiator-side applications
• Replacing a damaged OE-style manifold and converter unit

Installation Notes and Tips

Verify the vehicle’s emissions certification and exact engine configuration before ordering. This Federal / EPA part is not for sale or use on vehicles licensed in CA, CO, ME, or NY, and restrictions may apply in other states. Confirm the front left, radiator side position, the 6-bolt inlet flange, the 2-bolt outlet flange with male ball, and the single O2 sensor port before installation.

Quality Assurance

AP Exhaust uses automated workstations, spinner welding equipment, and high-speed production lines to build converters to exact OE dimensions and fitment. The ARISTO substrate chemistry and controlled manufacturing process support consistent construction and competitive replacement quality.