Walker 84177 Catalytic Converter - Front

Walker CalCat Direct-Fit Catalytic Converter

Walker CalCat Part Number 84177 is a direct-fit catalytic converter built for specific Honda Accord and Acura TSX front applications from 2008-2014. It is CARB certified for use in California and other states that require CARB-compliant replacement converters, with an OE-style fit that supports a straightforward exhaust repair.

Key Features

• Direct-fit catalytic converter for specific front-position applications
• CARB certified and validated to meet California emissions requirements
• Stainless steel body with a ceramic substrate
• 6-bolt welded flange inlet and 3-bolt welded flange outlet
• Pre- and post-catalyst oxygen sensor locations
• Round body design with OE-style dimensions for proper fitment
• Mounting hardware included
• Walker CalCat Part Number 84177

Product Details

Walker’s CalCat line focuses on direct-fit replacement converters engineered for emissions compliance and accurate fitment. This unit is designed for OBDII and non-OBD applications, and this specific part is listed for front-position use on 2008-2014 Honda Accord and Acura TSX models with the approved engine families noted in the fitment data. The stainless steel housing and ceramic substrate are selected for regular-duty replacement service, while the welded flange connections help maintain a factory-style exhaust interface. Walker 84177 is also cross-referenced to MagnaFlow Exhaust Products 5531441 for the same application.

Vehicle Fitment

• Fits 2014 Acura TSX, front
• Fits 2013 Acura TSX, front
• Fits 2012 Acura TSX, front
• Fits 2011 Acura TSX, front
• Fits 2010 Acura TSX, front
• Fits 2009 Acura TSX, front
• Fits 2012 Honda Accord, front
• Fits 2011 Honda Accord, front
• Fits 2010 Honda Accord, front
• Fits 2009 Honda Accord, front
• Fits 2008 Honda Accord, front

Common Repair Uses

• Replacing a failed front catalytic converter on a Honda Accord or Acura TSX
• Addressing emissions test failure related to catalyst efficiency
• Restoring exhaust flow after converter substrate damage or restriction
• Repairing a leaking or corroded OE-style converter assembly
• Resolving check engine light concerns tied to pre- and post-catalyst sensor readings

Installation Notes

For best results, verify the engine family number and emissions requirements before ordering. The fitment notes call for exhaust gasket use and list additional part 31556 as needed to complete installation. Because this converter uses welded flange connections and sensor provisions at both pre- and post-catalyst locations, confirm the existing exhaust layout matches the vehicle application before installation. Walker 84177 is a direct-fit replacement for the listed Honda Accord and Acura TSX front applications.

Quality Assurance

This CalCat converter is CARB certified and validated to meet California Air Resources Board standards for the covered applications. Walker designs the CalCat line for assured emissions compliance and OE-style fitment on approved vehicles, including the 2008-2014 Honda Accord and Acura TSX front positions listed here.