Walker 16866 Catalytic Converter with Integrated Exhaust Manifold - Rear

Overview of Walker EPA Catalytic Converter 16866

The Walker EPA Catalytic Converter with Integrated Exhaust Manifold (Part Number 16866) is designed specifically for Toyota Sienna models. This catalytic converter combines a stainless steel body with a ceramic substrate to provide reliable emission control and durability.

• Compatible with Toyota Sienna vehicles
• Integrated exhaust manifold design
• Stainless steel converter body for corrosion resistance
• Ceramic substrate for effective catalytic conversion
• 6 bolt welded flange inlet and 2 bolt welded flange outlet
• Pre-catalyst oxygen sensor location
• Regular grade type with round inlet and outlet ports
• Overall length of 18.25 inches for precise fitment

Product Features and Specifications

This catalytic converter features a 4.75-inch converter body length and a 4-inch body height and width, all shaped round to ensure proper exhaust flow. The inlet and outlet ports are both round, with the inlet utilizing a 6 bolt welded flange and the outlet a 2 bolt welded flange, facilitating secure attachment to the exhaust system. The ceramic substrate inside the converter body is engineered to reduce harmful emissions effectively, while the stainless steel construction offers resistance to rust and heat damage. The oxygen sensor is positioned pre-catalyst to monitor exhaust gases accurately.

Walker EPA Product Line Details

The EPA product line by Walker focuses on meeting environmental regulations with components designed for emission control. This catalytic converter with integrated exhaust manifold is part of that line, providing a solution that supports emission standards without requiring additional manifold components. It is engineered to maintain the balance between performance and compliance for vehicles like the Toyota Sienna.

Common Applications and Problem Solving

• Replacement for damaged or clogged catalytic converters on Toyota Sienna
• Restores proper exhaust flow and reduces emissions
• Addresses check engine light issues related to catalytic converter failure
• Improves vehicle emission compliance (non-CARB certified)
• Eliminates exhaust leaks caused by manifold or converter damage

Installation Notes and Tips

Installation requires proper alignment of the 6 bolt welded flange inlet and 2 bolt welded flange outlet to the vehicle’s exhaust system. Ensure the pre-catalyst oxygen sensor is correctly positioned to maintain accurate sensor readings. Due to the integrated exhaust manifold design, verify compatibility with the specific Toyota Sienna model year before installation.

Quality Assurance and Warranty

Walker’s EPA catalytic converters are manufactured with stainless steel and ceramic materials to ensure durability and consistent performance. While this part is not California Air Resources Board (CARB) certified, it meets regular grade standards for emission control. Warranty details should be confirmed with the supplier or manufacturer.