Walker 81862 Catalytic Converter - Front

Walker CalCat Direct-Fit Catalytic Converter

Walker CalCat 81862 is a direct-fit catalytic converter built for CARB-compliant replacement on select 2001-2003 Ford Ranger and Mazda B4000 front applications. It is designed for an OE-style fit and uses a ceramic substrate with stainless steel construction for a precise replacement on emissions-controlled vehicles.

Key Features

• CARB certified for use in California and other states that require CARB-compliant replacement converters
• Direct-fit design for select Ford Ranger and Mazda B4000 front positions
• Stainless steel body with ceramic substrate
• Round body shape with 2-bolt loose flange inlet and 3-bolt welded flange outlet
• Pre-catalyst oxygen sensor location
• OE-style fit for 2001-2003 applications

Product Details

The Walker CalCat product line focuses on direct-fit catalytic converters engineered for emissions compliance and accurate vehicle-specific fitment. Part number 81862 is listed for 2001-2003 Ford Ranger and Mazda B4000 front applications, including CARB Executive Order D-182-60 coverage for the specified engine families. This part cross-references Monroe Shocks & Struts (e.g., 441119) for the same application.

Walker 81862 uses a ceramic substrate inside a stainless steel body and measures 21 inches overall length with a 4-inch body height and width. The inlet uses a 2-bolt loose flange with spherical flare, while the outlet uses a 3-bolt welded flange. The direct-fit layout supports a cleaner replacement path for emissions repair work on the Ford Ranger and Mazda B4000.

Common Issues This Part Addresses

• Failed catalytic converter emissions testing
• Check engine light related to catalyst efficiency
• Restricted exhaust flow from a worn converter
• CARB compliance replacement needs for regulated states
• Front exhaust converter replacement on select Ranger and B4000 models

Installation Notes

Fits 2003 Ford Ranger, front. Fits 2003 Mazda B4000, front. Fits 2002 Ford Ranger, front. Fits 2002 Mazda B4000, front. Fits 2001 Ford Ranger, front. Fits 2001 Mazda B4000, front. Additional part 31637 is listed as needed to complete installation for the covered applications. Verify engine family number and emissions label before installation to confirm CARB Executive Order D-182-60 coverage.

Quality Assurance

Walker CalCat converters are designed, tested, and validated to meet CARB standards for the listed applications. Part number 81862 is a CARB-certified replacement catalytic converter for the specified Ford Ranger and Mazda B4000 fitments.