Eastern Convertors 40374 Catalytic Converter with Integrated Exhaust Manifold - Front Right

Direct-Fit Catalytic Converter Manifold

Eastern Convertors DIRECT FIT Part Number 40374 is a catalytic converter with an integrated exhaust manifold for the front right, firewall-side position on select Toyota Sienna models. It is built to OE dimensions for direct replacement service and uses ECO III catalyst technology with a Federal / EPA direct-fit manifold design.

The Eastern Convertors DIRECT FIT line focuses on OE-style fitment and application-specific construction. For this Toyota Sienna exhaust repair, the part number 40374 is engineered around the original manifold and converter layout to simplify replacement on the front right side.

• Fits 2004-2006 Toyota Sienna, front right
• Federal / EPA direct-fit manifold design
• Integrated catalytic converter and exhaust manifold construction
• ECO III catalyst type
• 6-bolt welded inlet and 2-bolt welded outlet
• 1 O2 sensor port
• 17.5-inch overall length
• Built to OE dimensions for application-specific fitment

Application Details

This catalytic converter manifold is made for the 2004-2006 Toyota Sienna front right firewall-side location. Part number 40374 is intended for direct replacement of the original exhaust manifold and converter assembly on vehicles with the listed Federal / EPA configuration. This part cross-references no listed interchange numbers in the provided data.

Common Repair Uses

• Replacing a damaged or cracked exhaust manifold assembly
• Restoring catalytic converter function after emissions-related failure
• Addressing exhaust leaks at the manifold or flange connections
• Correcting a failed O2 sensor mounting point in the manifold assembly
• Repairing a rusted or heat-damaged front exhaust section

Installation Notes

Verify the vehicle is a 2004-2006 Toyota Sienna with the correct Federal / EPA configuration before installation. Confirm the front right, firewall-side location, the 6-bolt welded inlet, the 2-bolt welded outlet, and the single O2 sensor port match the original part. Use new gaskets and follow factory torque procedures during installation.

Quality Assurance

Eastern Convertors uses automated workstations, spinner welding equipment, and high-speed production lines to build converters to exact OE dimensions and fitment. The ECO III catalyst formulation and NANO substrate chemistry are used to support efficient converter loading and consistent manufacturing quality.

Not legal for sale or use in California, Colorado, Maine, or New York for vehicles with California emissions.