AP Exhaust 644003 Catalytic Converter - Center

Overview of AP Exhaust Direct Fit Converter 644003

The AP Exhaust Direct Fit Converter 644003 is designed specifically for Nissan Maxima models, providing a reliable replacement catalytic converter. Constructed with durable stainless steel and a ceramic substrate, this federal/EPA direct-fit converter ensures compliance with emissions standards while maintaining vehicle performance.

• Stainless steel body for corrosion resistance and durability
• Ceramic substrate for effective catalytic conversion
• Federal/EPA direct-fit design for Nissan Maxima
• 3 bolt welded flange with gasket stub inlet on both sides
• Includes inlet and outlet gaskets and outlet hardware
• Overall length of 41.5 inches for precise fitment

Detailed Product Description

This AP Exhaust catalytic converter, part number 644003, is engineered to meet federal and EPA emissions requirements with a direct-fit design tailored for Nissan Maxima vehicles. The stainless steel body offers enhanced resistance to rust and corrosion, extending the life of the converter under harsh driving conditions. The ceramic substrate inside efficiently converts harmful exhaust gases into less harmful emissions, supporting environmental compliance.

The converter features a 3 bolt welded flange with gasket stub on both inlet sides, ensuring a secure and leak-free connection. It comes equipped with two inlet gaskets and an outlet gasket, along with outlet hardware, facilitating a proper seal and installation. With an overall length of 41.5 inches, this part fits precisely within the exhaust system of compatible Nissan Maxima models.

About the Direct Fit Converter Product Line

The Direct Fit Converter line from AP Exhaust focuses on providing catalytic converters that match OEM specifications for a direct replacement without modification. This product line emphasizes ease of installation and compliance with federal and EPA emissions standards, making it suitable for vehicles like the Nissan Maxima that require exact fitment and reliable performance.

Common Applications and Issues Addressed

• Replacement for a failing or clogged catalytic converter
• Restores proper emissions control to pass state inspections
• Eliminates exhaust leaks caused by damaged flanges or gaskets
• Improves engine performance affected by converter malfunction
• Ensures compliance with federal and EPA emissions regulations

Installation Notes and Tips

When installing the AP Exhaust Direct Fit Converter 644003 on a Nissan Maxima, ensure all inlet and outlet gaskets are properly seated to prevent exhaust leaks. The 3 bolt welded flange design requires matching hardware on the vehicle’s exhaust system. No inlet hardware is included, so verify existing bolts and studs are in good condition before installation. Proper torque specifications should be followed to maintain a secure fit.

Quality Assurance and Warranty

AP Exhaust catalytic converters are manufactured to meet federal and EPA standards, ensuring reliable emissions control. The stainless steel construction and ceramic substrate are designed for durability and long service life. Warranty details are provided by AP Exhaust and should be confirmed at the time of purchase to understand coverage specifics.