Walker 84227 Catalytic Converter - Left

CARB-Compliant Direct-Fit Catalytic Converter

Walker CalCat 84227 is a direct-fit catalytic converter built for specific applications and validated to meet CARB standards. It is engineered for a precise OE-style fit on 2009-2011 Ford Crown Victoria, Lincoln Town Car, and Mercury Grand Marquis left-side applications.

Walker CalCat direct-fit converters are part of Walker’s CARB-focused product line for OBDII and non-OBD vehicles, with fitment and emissions compliance addressed for regulated replacement needs. This Walker 84227 converter is designed for the left side and uses a stainless steel body with a ceramic substrate.

Key Features

• CARB certified for use in California and other CARB-regulated states
• Direct-fit, specific-fit design for OE-style installation
• Standard oval body shape with stainless steel construction
• Ceramic substrate for emissions control performance
• 2-bolt loose flange inlet with spherical flare
• 2-bolt welded flange outlet
• Post-catalyst oxygen sensor location
• Fits left-side applications on select Ford, Lincoln, and Mercury full-size sedans

Detailed Description

Walker CalCat 84227 is a replacement catalytic converter for 2009-2011 Ford Crown Victoria, Lincoln Town Car, and Mercury Grand Marquis left-side exhaust positions. It is CARB Executive Order D-182-72 approved for the listed engine families and is legal for sale and use in California and other states that require CARB-compliant replacement converters. The direct-fit layout supports OE-style alignment, while the stainless steel body and ceramic substrate are selected for emissions-system service on regulated vehicles. This part number 84227 is a fitment-specific solution for owners needing a compliant replacement on these applications.

This part cross-references Monroe Shocks & Struts (e.g., 551057) for the same application.

Common Issues This Part Can Address

• Failed emissions inspection due to a worn or inefficient catalytic converter
• Check engine light related to catalyst efficiency faults
• Restricted exhaust flow from a deteriorated converter core
• Replacement needs after converter damage, contamination, or internal breakdown
• CARB compliance requirements for regulated-state vehicle repairs

Installation Notes and Tips

• Fits 2011 Ford Crown Victoria, left; exhaust gasket is recommended
• Fits 2011 Lincoln Town Car, left; additional part 31336 is listed to complete installation
• Fits 2011 Mercury Grand Marquis, left; direct-fit configuration supports OE-style placement
• Fits 2010 Ford Crown Victoria, left; exhaust gasket is recommended
• Fits 2010 Lincoln Town Car, left; additional part 31336 is listed to complete installation
• Fits 2010 Mercury Grand Marquis, left; exhaust gasket is recommended
• Fits 2009 Ford Crown Victoria, left; additional part 31336 is listed to complete installation
• Fits 2009 Lincoln Town Car, left; exhaust gasket is recommended
• Fits 2009 Mercury Grand Marquis, left; additional part 31336 is listed to complete installation

Quality Assurance

Walker CalCat converters are designed, tested, and validated for CARB compliance on the listed applications. Verify the engine family number and Executive Order details against your vehicle before installation to confirm the correct emissions-approved replacement.