Walker 81840 Catalytic Converter - Front Left

Walker CalCat 81840 Catalytic Converter

Walker CalCat 81840 is a direct-fit catalytic converter built for CARB-compliant replacement needs on select Lexus RX300 applications. It uses an OE-style layout with welded 2-bolt flanges, a stainless steel body, and a ceramic substrate for a precise replacement on the front left position.

Key Features

• Direct-fit catalytic converter for specific vehicle applications
• CARB certified for use in California and other CARB-requiring states
• Stainless steel body with ceramic substrate
• Round body design with 2-bolt welded flange inlet and outlet
• Oxygen sensor port location not provided
• Walker CalCat line focused on OE-style fit and emissions compliance

Product Details

The Walker CalCat product line is designed for replacement buyers who need a catalytic converter that matches the original installation style and meets CARB standards. Part number 81840 is engineered for the 1999-2003 Lexus RX300, front left, and is listed for CARB Executive Order D-182-48. This makes it a direct-fit emissions component for drivers replacing a failed converter on a Lexus RX300 while maintaining the required emissions configuration.

Walker 81840 uses a stainless steel housing, a ceramic substrate, and a compact round body with an overall length of 12.75 inches. The inlet and outlet both use 2-bolt welded flanges, and the outlet measures 1.865 inches outside diameter. This part cross-references Monroe Shocks & Struts (e.g., 444227) for the same application.

Common Problems This Part Can Address

• Check engine light related to catalytic converter efficiency
• Failed emissions inspection due to converter deterioration
• Exhaust restriction caused by a worn or damaged converter
• Rust, cracking, or leakage at the original converter body or flanges
• Replacement needs for CARB-regulated Lexus RX300 exhaust systems

Installation Notes

Fits 2003 Lexus RX300, Front Left. Fits 2002 Lexus RX300, Front Left. Fits 2001 Lexus RX300, Front Left. Fits 2000 Lexus RX300, Front Left. Fits 1999 Lexus RX300, Front Left. Verify engine family number and emissions requirements before installation, since CARB applications are tied to specific vehicle configurations. Additional part(s) needed to complete installation are noted in the fitment data, and mounting hardware is not included.

Quality Assurance

Walker CalCat converters are designed, tested, and validated to meet CARB compliance requirements and to deliver a precise OE-style fit for the listed applications. Part number 81840 is CARB certified and intended for regulated replacement use on the specified Lexus RX300 models.