Walker 84184 Catalytic Converter with Integrated Exhaust Manifold - Front Left

Walker CalCat 84184 Overview

Walker CalCat 84184 is a catalytic converter with integrated exhaust manifold built for direct-fit replacement on select Ford Fusion and Mercury Milan applications. It is CARB certified and engineered for OBDII and non-OBD vehicles, with OE-style fitment for the front left position.

Walker CalCat is the product line for California-compliant replacement converters, focused on precise fit and emissions compliance for vehicles that require CARB-approved parts. This manifold catalytic converter follows that approach with a stainless steel body, ceramic substrate, and welded flange connections.

• CARB certified with Executive Order D-182-72
• Fits the front left exhaust position
• Integrated exhaust manifold design
• Stainless steel converter body with ceramic substrate
• 6-bolt welded inlet flange and 2-bolt welded outlet flange
• Pre- and post-catalyst oxygen sensor location
• OE-style dimensions for direct replacement use
• Walker part number 84184 for application lookup

Detailed Product Description

Walker 84184 is designed for 2007-2012 Ford Fusion and 2007-2011 Mercury Milan front left applications that require a CARB-compliant replacement catalytic converter with integrated manifold. The unit uses a round stainless steel converter body, oval inlet port, round outlet port, and a ceramic substrate to support emissions control in the specified engine families. Its overall length measures 23.21 inches, with a 6.25-inch converter body length and 4.02-inch body height and width.

For buyers searching for a 2010 Ford Fusion catalytic converter, a 2011 Mercury Milan front left manifold converter, or a CARB catalytic converter for Ford Fusion 2007-2012, this part number 84184 provides a direct-fit solution with the correct flange style and sensor placement. It is also listed for use in California and other states that require CARB-compliant replacement converters.

What This Part Helps Address

• Failed emissions testing caused by a worn or inefficient catalytic converter
• Exhaust leaks at the manifold-to-pipe connection
• Check engine light concerns related to catalyst efficiency or sensor readings
• Replacement needs after corrosion or heat damage in the front left exhaust section
• Fitment issues from non-OE-style aftermarket exhaust components

Installation Notes

Fits 2012 Ford Fusion, front left. Fits 2011 Ford Fusion, front left. Fits 2011 Mercury Milan, front left. Fits 2010 Ford Fusion, front left. Fits 2010 Mercury Milan, front left. Fits 2009 Ford Fusion, front left. Fits 2009 Mercury Milan, front left. Fits 2008 Ford Fusion, front left. Fits 2008 Mercury Milan, front left. Fits 2007 Ford Fusion, front left. Fits 2007 Mercury Milan, front left.

An exhaust gasket is recommended, and additional part 31709 is noted as needed to complete installation. Verify engine family number and emissions requirements before installation, especially for California and other CARB-regulated states. This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

Quality Assurance

Walker designs, tests, and validates CalCat converters for CARB compliance and OE-style fitment. Part number 84184 is built to meet the listed emissions application requirements for the specified Ford Fusion and Mercury Milan vehicles.