AP Exhaust 644164 Catalytic Converter - Rear
AP Exhaust Catalytic Converter for Mazda 3
The AP Exhaust catalytic converter part number 644164 is designed specifically for Mazda 3 models, providing a direct-fit replacement that meets Federal and EPA standards. Constructed from durable stainless steel, this catalytic converter ensures reliable performance and longevity.
Key Features of AP Exhaust Catalytic Converter 644164
- Body material made of corrosion-resistant stainless steel
- Federal / EPA direct-fit design for Mazda 3
- Overall length of 75 inches for precise fitment
- 2 bolt welded inlet and outlet types for secure connections
- Includes one clamp, inlet and outlet gaskets, and inlet and outlet hardware
Detailed Product Description
This AP Exhaust catalytic converter (part number 644164) is engineered to replace the factory catalytic converter on Mazda 3 vehicles. The stainless steel body offers enhanced durability against rust and corrosion, extending the service life of the exhaust component. The inlet and outlet connections feature 2 bolt welded flanges, ensuring a tight and secure fit to the existing exhaust system. With an overall length of 75 inches, this converter is designed to match OEM specifications for a seamless installation. The product includes one clamp, inlet and outlet gaskets, and the necessary hardware for both inlet and outlet connections, facilitating a straightforward replacement process.
Common Applications and Issues Addressed
- Replacement for faulty or clogged catalytic converters on Mazda 3
- Restores proper exhaust emissions control to meet Federal and EPA regulations
- Eliminates exhaust leaks caused by damaged or worn converter components
- Improves engine performance by ensuring efficient exhaust flow
- Resolves check engine light issues related to catalytic converter failure
Installation Notes and Tips
When installing the AP Exhaust catalytic converter 644164 on a Mazda 3, ensure all gaskets are properly seated to prevent exhaust leaks. The 2 bolt welded inlet and outlet flanges require precise alignment for secure fastening. It is recommended to inspect the surrounding exhaust components for wear or damage during installation. Proper torque specifications should be followed for all hardware to maintain a reliable seal and avoid premature failure.
Quality Assurance and Warranty
AP Exhaust catalytic converters are manufactured to meet Federal and EPA standards, ensuring compliance with emissions regulations. The stainless steel construction provides resistance to corrosion and heat, contributing to product durability. Warranty details are subject to the manufacturer's terms and conditions.


Description
AP Exhaust Catalytic Converter for Mazda 3
The AP Exhaust catalytic converter part number 644164 is designed specifically for Mazda 3 models, providing a direct-fit replacement that meets Federal and EPA standards. Constructed from durable stainless steel, this catalytic converter ensures reliable performance and longevity.
Key Features of AP Exhaust Catalytic Converter 644164
- Body material made of corrosion-resistant stainless steel
- Federal / EPA direct-fit design for Mazda 3
- Overall length of 75 inches for precise fitment
- 2 bolt welded inlet and outlet types for secure connections
- Includes one clamp, inlet and outlet gaskets, and inlet and outlet hardware
Detailed Product Description
This AP Exhaust catalytic converter (part number 644164) is engineered to replace the factory catalytic converter on Mazda 3 vehicles. The stainless steel body offers enhanced durability against rust and corrosion, extending the service life of the exhaust component. The inlet and outlet connections feature 2 bolt welded flanges, ensuring a tight and secure fit to the existing exhaust system. With an overall length of 75 inches, this converter is designed to match OEM specifications for a seamless installation. The product includes one clamp, inlet and outlet gaskets, and the necessary hardware for both inlet and outlet connections, facilitating a straightforward replacement process.
Common Applications and Issues Addressed
- Replacement for faulty or clogged catalytic converters on Mazda 3
- Restores proper exhaust emissions control to meet Federal and EPA regulations
- Eliminates exhaust leaks caused by damaged or worn converter components
- Improves engine performance by ensuring efficient exhaust flow
- Resolves check engine light issues related to catalytic converter failure
Installation Notes and Tips
When installing the AP Exhaust catalytic converter 644164 on a Mazda 3, ensure all gaskets are properly seated to prevent exhaust leaks. The 2 bolt welded inlet and outlet flanges require precise alignment for secure fastening. It is recommended to inspect the surrounding exhaust components for wear or damage during installation. Proper torque specifications should be followed for all hardware to maintain a reliable seal and avoid premature failure.
Quality Assurance and Warranty
AP Exhaust catalytic converters are manufactured to meet Federal and EPA standards, ensuring compliance with emissions regulations. The stainless steel construction provides resistance to corrosion and heat, contributing to product durability. Warranty details are subject to the manufacturer's terms and conditions.





















