Walker 84353 Catalytic Converter - Front

Walker CalCat 84353 Catalytic Converter

Walker CalCat 84353 is a direct-fit catalytic converter built for specific Mazda applications with CARB-compliant coverage where listed. It is designed for an OE-style fit and uses a stainless steel body with a ceramic substrate for emissions system replacement on select Mazda 3 and Mazda 5 models.

Key Features

• Direct-fit catalytic converter for specific vehicle applications
• CARB certified for listed California and CARB-state fitments
• Stainless steel body with ceramic substrate
• 6-bolt welded flange inlet and 2-bolt welded flange outlet
• Pre- and post-catalyst oxygen sensor location
• Mounting hardware included
• Round body design with OE-style dimensions

Product Details

Walker CalCat is the Walker emissions line focused on direct-fit replacement converters that are tested and validated for regulated applications. Part number 84353 is built for specific Mazda fitment and follows the original-style exhaust layout, helping maintain proper installation geometry and emissions-system function. This part number 84353 is listed for 2010 Mazda 5 front applications and 2004-2009 Mazda 3 applications with the notes shown in the fitment data.

Compatible With 2010 Mazda 5, front. Compatible With 2004-2009 Mazda 3, position not specified in the fitment data. This part cross-references no additional part numbers in the provided data.

What It Helps Address

• Failed catalytic converter emissions testing
• Check engine light concerns related to catalyst efficiency
• Restricted exhaust flow from a worn converter
• Replacement needs after corrosion or internal substrate damage
• CARB-compliant replacement requirements for listed vehicles

Installation Notes

Exhaust gasket is recommended for installation. Additional part 31540 is listed as needed to complete installation for the covered applications. Verify engine family number, emissions label, and state regulations before ordering, since some listed Mazda 3 applications are not legal for sale or use in California but are legal in other CARB-compliant states for EPA Federal Emission Equipped Vehicles only.

Fitment is specific, so confirm the vehicle year, model, and emissions configuration before installation. The converter uses pre- and post-catalyst oxygen sensor locations and a welded-flange connection style, which supports a direct replacement on the listed applications.

Quality Assurance

Walker CalCat converters are designed, tested, and validated to meet CARB standards for the applications shown. Part number 84353 is CARB certified where listed and built to provide OE-style fitment for regulated emissions replacement.