AP Exhaust 645479 Catalytic Converter - Front

AP Exhaust Direct Fit Converter for Ram 2500/3500

AP Exhaust part number 645479 is a Federal / EPA direct-fit catalytic converter built for front-position applications on select Ram heavy-duty trucks. It uses a stainless steel body with a ceramic substrate and is configured for direct replacement service on 2014-2022 Ram 2500 and 2014-2022 Ram 3500 models.

Key Features

• Federal / EPA direct-fit catalytic converter
• Stainless steel body construction
• Ceramic substrate material
• Front-position fitment for Ram 2500 and Ram 3500
• Four O2 sensor ports for emissions-system integration
• Flare with spin flange inlet connections and welded flange outlet connection
• AP Exhaust Direct Fit Converter line for application-specific replacement

Product Details

The AP Exhaust Direct Fit Converter line focuses on application-matched exhaust replacement, and this converter follows that approach with a direct-fit layout for the Ram 2500 and Ram 3500 front exhaust location. Part number 645479 is built with a stainless steel shell and ceramic substrate to match the needs of emissions-system service while maintaining the correct connection style for the listed trucks. It is not CARB certified and is intended for Federal / EPA applications. For buyers searching for a Ram 2500 catalytic converter front replacement or a Ram 3500 direct-fit converter, AP Exhaust 645479 provides a vehicle-specific option for the listed model years.

Common Issues This Part Can Address

• Failed catalytic converter efficiency codes
• Restricted exhaust flow from a worn converter
• Emissions test failure related to converter performance
• Check engine light concerns tied to catalyst monitoring
• Exhaust system replacement needs on front-position applications

Installation Notes and Tips

Fits 2014-2022 Ram 2500, front; Federal and California Emissions; Direct Fit Converter. Fits 2014-2022 Ram 3500, front; Federal and California Emissions; Direct Fit Converter. Verify the vehicle’s emissions configuration and sensor layout before installation, since this converter includes four O2 sensor ports and uses flare with spin flange inlet connections with a welded flange outlet. Confirm the front exhaust location and compare the existing pipe and flange style to the part number 645479 before assembly.

Quality Assurance

AP Exhaust Direct Fit Converter components are built for application-specific exhaust replacement and are boxed for protection during handling and storage. Part number 645479 is a Federal / EPA direct-fit catalytic converter with stainless steel construction and a ceramic substrate for the listed Ram applications.