AP Exhaust 645854 Catalytic Converter - Right

AP Exhaust 645854 Catalytic Converter

AP Exhaust 645854 is a federal EPA direct-fit catalytic converter built for the right side of select Dodge Ram 1500 applications. It combines a stainless steel body with a ceramic substrate and OE-style dimensions for a direct replacement that matches the original fitment profile.

Fits 2004-2005 Dodge Ram 1500, right. This AP Exhaust catalytic converter is engineered for vehicles with a 2-bolt loose flange w/ flare inlet, 2.25" ID inlet connection, and 2.50" OD pipe outlet.

Key Features

• Federal / EPA direct-fit catalytic converter
• Stainless steel body for corrosion resistance
• Ceramic substrate material
• 2 O2 sensor ports
• 2-bolt loose flange w/ flare inlet design
• 2.50" OD pipe outlet with outlet hardware included
• Built to exact OE dimensions and fitment

Detailed Description

AP Exhaust part number 645854 uses ARISTO substrate chemistry and AP Emissions Technologies manufacturing methods to support efficient catalyst loading while maintaining OE-style fit and dimensional accuracy. The converter is built with automated production processes and spinner welding equipment to help deliver consistent construction for the 2004-2005 Dodge Ram 1500, right side application. With a 55.5-inch overall length and stainless steel body, this unit is specified as a direct-fit replacement for the listed emissions configuration.

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

What It Helps Address

• Failed catalytic converter efficiency codes
• Exhaust restriction from a deteriorated converter
• Emissions test failure related to catalyst performance
• Exhaust leaks at the converter connection points
• Fitment issues from a non-OE-style replacement part

Installation Notes and Tips

Verify the vehicle is a 2004-2005 Dodge Ram 1500, right-side application before installation. Confirm the inlet style, 2.25" ID inlet connection, 2.50" OD outlet pipe, and the presence of 2 O2 sensor ports match the original exhaust layout. This converter does not require inlet or outlet gaskets, and outlet hardware is specified. Check local emissions regulations before use, as this federal EPA converter is noted for specific state restrictions.

Quality Assurance

AP Exhaust builds this converter to OE dimensions and fitment using controlled manufacturing processes and stainless steel construction. The ARISTO substrate design is used to support efficient catalyst loading and consistent converter performance within the specified application.