Walker 81843 Catalytic Converter with Integrated Exhaust Manifold - Front or Front Left

Overview of Walker CalCat Catalytic Converter 81843

The Walker CalCat Catalytic Converter with Integrated Exhaust Manifold (part number 81843) is designed for select Toyota and Lexus models from 1998 to 2004. This catalytic converter meets California Air Resources Board (CARB) standards, ensuring compliance with emissions regulations for vehicles like the Toyota Camry and Lexus ES300.

• CARB certified with Executive Order Number D-182-66
• Constructed from durable stainless steel for long-lasting performance
• Ceramic substrate material for efficient catalytic conversion
• Integrated exhaust manifold design simplifies installation
• 6 bolt welded flange inlet and 2 bolt welded flange outlet
• Compatible with Toyota Avalon, Camry, Solara, and Lexus ES300 models (1998-2004)
• Overall length approximately 15.62 inches with round inlet and outlet ports

Walker CalCat Product Line Details

The CalCat line by Walker focuses on catalytic converters that combine quality materials with regulatory compliance. This product line integrates the exhaust manifold with the catalytic converter body, reducing installation complexity and potential leak points. The 81843 model exemplifies the CalCat approach by offering a stainless steel body and ceramic substrate that meet emissions standards for California and other states with strict air quality requirements.

Product Specifications and Features

This catalytic converter features a 4.5-inch converter body length and an overall length of 15.62 inches. Both the inlet and outlet ports are round, with the inlet utilizing a 6 bolt welded flange and the outlet a 2 bolt welded flange, designed for secure and precise fitment. The converter body measures 4 inches in height and width, maintaining a compact round shape that fits the exhaust system layout of compatible Toyota and Lexus vehicles. The ceramic substrate inside the converter efficiently reduces harmful emissions by facilitating chemical reactions that convert exhaust gases into less harmful substances.

Applications and Common Issues Addressed

• Replacement for failing or clogged catalytic converters on 1998-2004 Toyota Camry and Lexus ES300
• Restores proper exhaust flow and reduces emissions to meet CARB standards
• Eliminates exhaust leaks caused by damaged or corroded manifolds
• Resolves check engine light issues related to catalytic converter efficiency
• Improves overall vehicle emissions system performance

Installation Notes and Tips

When installing the Walker CalCat 81843 catalytic converter, ensure the 6 bolt welded flange inlet and 2 bolt welded flange outlet align correctly with the vehicle’s exhaust system. Proper torque specifications should be followed to avoid exhaust leaks. This integrated exhaust manifold design reduces the number of connections, which can simplify installation compared to separate manifold and converter assemblies. It is recommended to inspect surrounding exhaust components for wear or damage during replacement.

Quality Assurance and Compliance

The Walker CalCat 81843 catalytic converter is CARB certified under Executive Order D-182-66, confirming its compliance with California emissions regulations. Constructed from stainless steel and featuring a ceramic substrate, this part is built to withstand high temperatures and corrosive exhaust gases. While specific warranty details are not provided, Walker products typically adhere to industry standards for durability and performance.