Walker 84361 Catalytic Converter with Integrated Exhaust Manifold - Front

Walker CalCat Manifold Converter for Mazda 3

Walker CalCat Part Number 84361 is a catalytic converter with integrated exhaust manifold built for specific Mazda 3 front applications. It is CARB certified, uses a stainless steel body with a ceramic substrate, and is engineered for a precise OE-style fit.

Walker CalCat is the Walker emissions line focused on CARB-compliant replacement converters for OBDII and non-OBD vehicles. This manifold-style design helps simplify replacement on the front exhaust section while maintaining the required emissions configuration for covered applications.

Key Features

• Part Number: 84361
• CARB certified with Executive Order D-182-73
• Integrated exhaust manifold design
• Stainless steel converter body and stainless finish
• Ceramic substrate material
• 7-bolt welded flange inlet and 2-bolt welded flange outlet
• Pre- and post-catalyst oxygen sensor locations
• Mounting hardware included
• Contents include warranty card, installer card, and gasket

Detailed Description

This Walker CalCat catalytic converter with integrated exhaust manifold is designed for Mazda 3 front exhaust applications that require a CARB-compliant replacement. The unit measures 36 inches overall, with a 6.25-inch converter body length, 4-inch body height, and 4-inch body width. Its round body and round inlet port shape support an OE-style installation profile, while the welded flange connections are built for the specified exhaust layout. Part Number 84361 is listed for 2012-2013 Mazda 3 front applications and is also referenced for 2010-2011 Mazda 3 coverage in CARB-compliant states where permitted by the fitment notes.

For shoppers searching for a Mazda 3 catalytic converter with manifold, CARB compliant replacement converter, or Walker 84361, this part is built around the exact fitment and emissions requirements shown in the catalog data.

What It Helps Address

• Failed catalytic converter emissions testing
• Check engine light concerns related to catalyst efficiency
• Exhaust leaks at the manifold/converter assembly
• Damaged or corroded front exhaust converter housing
• Replacement needs for CARB-regulated Mazda 3 exhaust systems

Installation Notes

• Fits 2013 Mazda 3, front; CARB Executive Order D-182-73; exhaust gasket is recommended; additional part needed to complete installation: 31540.
• Fits 2012 Mazda 3, front; CARB Executive Order D-182-73; exhaust gasket is recommended; additional part needed to complete installation: 31540.
• Fits 2011 Mazda 3, N/A position; not legal for sale or use in California; legal in other CARB-compliant states for EPA Federal Emission Equipped Vehicles only; exhaust gasket is recommended; additional part needed to complete installation: 31540.
• Fits 2010 Mazda 3, N/A position; from 07/01/2010; not legal for sale or use in California; legal in other CARB-compliant states for EPA Federal Emission Equipped Vehicles only; exhaust gasket is recommended; additional part needed to complete installation: 31540.
• Verify engine family number and emissions requirements before installation.

Quality Assurance

Walker CalCat converters are designed, tested, and validated to meet CARB standards for the listed applications. Part Number 84361 is backed by the included warranty card and installer card, and it is built to deliver the specified OE-style fit for the covered Mazda 3 fitments.