Walker 16638 Catalytic Converter - Front

EPA Direct-Fit Catalytic Converter for Honda Odyssey

Walker EPA 16638 is a direct-fit catalytic converter built for specific applications on the Honda Odyssey. It is engineered for 2005-2010 front-position fitment on select Federal and California emission models, with stainless steel construction and a ceramic substrate for OE-style exhaust flow management.

The Walker Ultra Direct-Fit Catalytic Converter line is focused on EPA-compliant replacement coverage for import and domestic OBDII vehicles. For this application, Walker 16638 provides a direct-fit layout with welded flange connections and pre- and post-catalyst oxygen sensor locations.

Key Features

• Direct-fit catalytic converter for specific Honda Odyssey applications
• Fits 2005-2009 Honda Odyssey, front
• Fits 2010 Honda Odyssey, front right
• Stainless steel body with round 4-inch housing
• Ceramic substrate material
• 4-bolt welded flange inlet and 3-bolt welded flange outlet
• Pre- and post-catalyst oxygen sensor locations
• EPA standards-focused replacement part
• Part number 16638 for application matching

Detailed Description

Walker 16638 is a specific-fit catalytic converter for the Honda Odyssey, covering 2005-2010 front-position applications. The converter uses a stainless steel body, a ceramic substrate, and welded flange connections to match the original exhaust layout more closely than a universal replacement. Its overall length is 14.875 inches, with a 4-inch round body profile and one inlet and one outlet.

This part is intended for Federal emission-equipped vehicles and select California emission models listed in the fitment data. It is not CARB certified, so state emissions rules should be verified before purchase. If you are searching for a Walker catalytic converter for Honda Odyssey front right fitment, Walker 16638 is the direct-fit reference to compare against your vehicle’s year, emission setup, and VIN break.

This part cross-references Gates 51893 for the same application.

Common Problems This Part May Address

• Failed catalytic converter emissions test
• Check engine light related to catalyst efficiency codes
• Restricted exhaust flow from a worn converter
• Exhaust odor caused by catalyst deterioration
• Fitment issues from a damaged or incorrect replacement converter

Installation Notes and Tips

• Verify the vehicle year, emission type, and position before ordering.
• For 2010 Honda Odyssey applications, confirm the VIN break listed in the fitment notes.
• Exhaust gasket is recommended during installation.
• Additional parts listed for completion are 31733 and 31377.
• Check oxygen sensor routing for pre- and post-catalyst placement before final assembly.

Quality Assurance

Walker EPA 16638 is built to meet EPA standards for the listed applications and is part of Walker’s Ultra Direct-Fit Catalytic Converter line for OBDII vehicles. Package contents include an installer card and warranty card.