Walker 56187 Catalytic Converter

Walker EPA Direct-Fit Catalytic Converter

Walker EPA 56187 is a direct-fit catalytic converter built for 1998-2000 Toyota Sienna applications with a Federal Emission System. It uses a stainless steel body, ceramic substrate, and OE-style flange connections to match the original exhaust layout on the vehicle.

Walker Ultra Direct-Fit Catalytic Converters are part of the EPA-focused Walker EPA line, offering a direct replacement format for 1996-and-newer import and domestic OBDII vehicles where EPA-compliant fitment is required.

Key Features

• Direct-fit design for straightforward replacement on the listed Toyota Sienna applications
• Stainless steel body with oval housing profile
• Ceramic substrate material
• 2-bolt welded flange inlet and outlet connections
• Post-catalyst oxygen sensor location
• EPA-compliant design for Federal Emission System vehicles
• Walker 56187 interchange reference for cross-checking

Product Details

This catalytic converter is engineered for 1998-2000 Toyota Sienna models with Federal emissions equipment. The direct-fit configuration follows the original exhaust routing and flange style, while the stainless steel body helps resist exhaust-system corrosion. The oval converter body measures 10 inches long, 6.125 inches wide, and 3.5 inches high, with an overall length of 68.375 inches.

Walker 56187 is listed for Toyota Sienna fitment in 1998, 1999, and 2000, and it cross-references Walker Exhaust 52457 for the same application. It is not CARB certified and is not legal for sale or use in California and other CARB-compliant states. New York and Maine use restrictions apply to EPA Federal Emission Equipped Vehicles only.

Common Repair Uses

• Replacing a restricted or failed catalytic converter on a 1998-2000 Toyota Sienna
• Restoring exhaust flow after catalyst efficiency codes or emissions-test failure
• Addressing exhaust leaks at the converter flange connections
• Replacing a rusted or damaged OE-style converter assembly
• Correcting post-catalyst oxygen sensor-related exhaust system issues

Installation Notes

Fits 1998-2000 Toyota Sienna, N/A. Exhaust gasket is recommended. Additional parts needed to complete installation include 31374 and 2 of 31332. Verify Federal Emission System configuration before installation and confirm state emissions requirements before purchase or use.

Quality Assurance

Walker EPA catalytic converters are built to meet EPA standards for listed OBDII applications and are designed as direct-fit replacements for the specified vehicle range. This part number is 56187.