Walker 16403 Catalytic Converter with Integrated Exhaust Manifold - Front

Overview of Walker EPA Catalytic Converter 16403

The Walker EPA Catalytic Converter with Integrated Exhaust Manifold (Part Number 16403) is designed for direct fit replacement on select Nissan vehicles. Engineered to meet regular grade standards, this catalytic converter supports emission control for Nissan Altima and Sentra models from 2004 to 2006.

• Direct fit catalytic converter with integrated exhaust manifold
• Constructed from durable stainless steel for corrosion resistance
• Ceramic substrate material for effective emission filtration
• Compatible with Nissan Altima and Sentra (2004-2006)
• Features 5 bolt welded flange inlet and 2 bolt welded flange outlet connections
• Overall length of 19 inches with a 4-inch converter body length
• Oval inlet port and round outlet port shapes for precise fitment
• Mounting hardware included for installation

Walker EPA Product Line Details

The EPA product line by Walker focuses on providing emission control components that comply with federal Environmental Protection Agency standards. This catalytic converter 16403 is part of the EPA line, offering a reliable solution for maintaining emission performance on Nissan vehicles without CARB certification. The line emphasizes direct fitment and durable materials to ensure proper function and longevity.

Product Features and Specifications

This catalytic converter features a stainless steel body and converter housing, providing resistance to rust and heat. The ceramic substrate inside effectively reduces harmful exhaust emissions. The integrated exhaust manifold design simplifies installation by combining two components into one unit. The inlet uses a 5 bolt welded flange with an oval port shape, while the outlet has a 2 bolt welded flange with a round port shape, ensuring compatibility with the factory exhaust system. The overall length measures 19 inches, with a 4-inch converter body length, making it suitable for direct replacement on Nissan Altima and Sentra models from 2004 through 2006.

Common Applications and Problem Solving

• Replacement for damaged or clogged catalytic converters on Nissan Altima and Sentra (2004-2006)
• Restores proper exhaust flow and reduces emissions
• Addresses check engine light issues related to catalytic converter failure
• Helps pass emissions testing where federal EPA compliance is required
• Prevents exhaust leaks caused by manifold or converter damage

Installation Notes and Tips

This Walker catalytic converter 16403 is designed for direct fit installation, matching factory mounting points and flange connections. The included mounting hardware facilitates secure attachment. Ensure proper alignment of the oval inlet and round outlet ports during installation to avoid exhaust leaks. Professional installation is recommended to maintain emission system integrity and avoid damage to surrounding components.

Quality Assurance and Warranty

Walker provides quality assurance through the use of stainless steel materials and a ceramic substrate designed for durability and emission control. While specific warranty details are not provided, Walker’s EPA product line is manufactured to meet federal emission standards and undergoes quality checks to ensure reliable performance on compatible Nissan vehicles.