AP Exhaust 645866 Catalytic Converter - Right

OE-Fit Catalytic Converter for Ram 1500

AP Exhaust 645866 is a federal/EPA direct-fit catalytic converter built for the 2004-2005 Dodge Ram 1500, right side. It uses a stainless steel body, a ceramic substrate, and OE-style dimensions to support proper exhaust flow and fitment on the specified application.

For buyers searching for a 2004-2005 Dodge Ram 1500 right catalytic converter, AP Exhaust 645866 provides a direct-fit replacement with the inlet and outlet configuration needed for the listed truck application.

Key Features

• Direct-fit catalytic converter for the right side
• Federal / EPA emissions type
• Stainless steel body for corrosion resistance
• Ceramic substrate material
• 2-bolt loose flange w/ flare inlet design
• 2 O2 sensor ports
• Outlet hardware included; outlet gasket not required
• Overall length: 54.38 in.

Detailed Description

AP Exhaust 645866 is engineered as an OE-style replacement catalytic converter for the Dodge Ram 1500. The converter uses ARISTO substrate chemistry and AP Emissions Technologies manufacturing methods to support efficient catalyst loading while maintaining exact OE dimensions and fitment. The stainless steel body and ceramic substrate are selected for durability and emissions performance in the specified right-side exhaust location. This part number, 645866, is built for 2004-2005 Dodge Ram 1500 applications and is listed for federal and California emissions configurations, with state-use restrictions noted by the manufacturer.

This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

Common Issues It Can Address

• Failed catalytic converter emissions testing
• Check engine light related to catalyst efficiency
• Restricted exhaust flow from a worn converter
• Rust or damage to the original converter body
• Fitment problems when replacing a damaged right-side unit

Installation Notes

Fits 2004-2005 Dodge Ram 1500, right. Verify the 2-bolt loose flange w/ flare inlet, 2.25 in. ID inlet, and 2.75 in. OD pipe outlet before installation. The converter has 2 O2 sensor ports, and outlet hardware is included while inlet hardware is not. Inlet and outlet gaskets are not required for this application. Confirm local emissions requirements before installation, especially for vehicles licensed in CA, CO, ME, and NY.

Quality Assurance

AP Exhaust uses automated workstations, spinner welding equipment, and high-speed production lines to build converters to OE dimensions and fitment standards. Part number 645866 is manufactured for consistent application-specific replacement on the listed Dodge Ram 1500 models.