Walker 16624 Catalytic Converter with Integrated Exhaust Manifold - Front

EPA-Compliant Manifold Converter for Toyota and Lexus

Walker EPA 16624 is a direct-fit catalytic converter with integrated exhaust manifold for select Toyota and Lexus front applications. It is built with a stainless steel body, ceramic substrate, and OE-style flange connections to support emissions repair on OBDII vehicles.

Walker Ultra EPA-Compliant Manifold Converters are part of the EPA-focused product line for import and domestic 1996-and-newer vehicles. This unit is designed for direct replacement service on front-mounted exhaust manifold converter applications, including Toyota Sienna, Toyota Highlander, Lexus RX350, and Toyota RAV4 coverage.

• Direct-fit catalytic converter with integrated exhaust manifold
• Stainless steel body and converter housing
• Ceramic substrate material
• 6-bolt welded flange inlet and 3-bolt welded flange outlet
• Pre-catalyst oxygen sensor location
• Includes manifold converter, inlet and outlet gaskets, and bolt kit
• Fits Fed. & Calif. emission models for listed applications, with state-use restrictions noted below

Detailed Product Overview

Walker 16624 is engineered as a front manifold converter for 2006-2016 Toyota and Lexus applications, with direct-fit geometry and OE-style round inlet and outlet ports. The stainless steel construction supports exhaust system durability, while the ceramic substrate is used for emissions control in the converter body. Overall length is 17 inches, and the unit uses a 6-bolt welded flange at the inlet and a 3-bolt welded flange at the outlet for a factory-style connection.

Fits 2008-2016 Toyota Highlander, front. Fits 2007-2016 Toyota Sienna, front. Fits 2007-2015 Lexus RX350, front. Fits 2006-2012 Toyota RAV4, front. Walker 16624 is a practical replacement choice when servicing the front exhaust manifold converter on these vehicles.

This part cross-references AP Exhaust 641298 for the same application.

What This Part Helps Address

• Failed catalytic converter emissions testing
• Exhaust leaks at the manifold converter assembly
• Check engine light concerns related to catalyst efficiency
• Damaged or corroded factory manifold converter housing
• Fitment issues when replacing a front exhaust manifold converter on listed Toyota and Lexus models

Installation Notes

Exhaust gasket is recommended during installation. Additional part 31332 is noted as needed to complete installation for the listed applications. Verify emission certification requirements before purchase: this EPA converter is not legal for sale or use in California and other CARB-compliant states. It is legal in New York and Maine on EPA Federal Emission Equipped Vehicles only. Confirm the vehicle’s emission label, engine configuration, and front converter layout before installation.

Quality Assurance

Walker EPA 16624 is built to meet EPA emissions requirements for the listed OBDII applications and is supplied with direct-fit hardware details that support a factory-style repair process. The Walker Ultra EPA-Compliant Manifold Converter line is positioned for emissions-compliant replacement on import and domestic vehicles where EPA coverage applies.