AP Exhaust 644222 Catalytic Converter - Right

AP Exhaust Direct Fit Converter for Mercedes-Benz

AP Exhaust Part Number 644222 is a Federal / EPA direct-fit catalytic converter built for specific Mercedes-Benz applications. It uses a ceramic substrate and a direct-fit layout to match the original exhaust routing on the right side of the vehicle.

This AP Exhaust Direct Fit Converter line is focused on OE-style replacement fitment for emissions service, with application-specific inlet and outlet connections and dual O2 sensor ports. For drivers searching for a Mercedes-Benz C300 catalytic converter right side or a Mercedes-Benz E350 direct-fit converter, this part number 644222 is built around those exact vehicle requirements.

Key Features

• Federal / EPA direct-fit catalytic converter
• Ceramic substrate material
• Right-side fitment for listed Mercedes-Benz applications
• 1 inlet and 1 outlet configuration
• 2 O2 sensor ports
• Inlet connection: flare with spin flange, 2-bolt spinner type
• Outlet connection: pipe, 2.165" OD x 2 1/4
• Overall length: 69.000

Detailed Description

AP Exhaust 644222 is a direct-fit catalytic converter for 2008-2011 Mercedes-Benz C300, 2008-2011 Mercedes-Benz C350, and 2010-2011 Mercedes-Benz E350 on the right side. It is configured for Federal / EPA emissions applications and is also listed for California emissions fitment on the supported vehicles. The ceramic substrate supports exhaust aftertreatment performance while the direct-fit design helps maintain the original connection points and sensor locations.

As part of the AP Exhaust Direct Fit Converter product line, this converter is built for vehicle-specific replacement rather than universal adaptation. That makes it a practical choice when replacing a worn or restricted Mercedes-Benz C300 catalytic converter, Mercedes-Benz C350 catalytic converter, or Mercedes-Benz E350 catalytic converter with the correct right-side configuration. Part number 644222 is the identifier to reference when matching the application.

What It Helps Address

• Failed catalytic converter emissions testing
• Check engine light concerns related to catalyst efficiency
• Restricted exhaust flow from a deteriorated converter
• Noise or rattling from a damaged internal substrate
• Replacement needs for the right-side exhaust converter on listed Mercedes-Benz models

Installation Notes

Verify the vehicle’s emissions configuration and right-side placement before installation. Confirm the inlet and outlet connection styles, O2 sensor port locations, and overall length against the original converter to ensure proper alignment. Because this unit is a direct-fit design, it is intended to follow the factory exhaust layout on the listed Mercedes-Benz applications.

Part number 644222 should be matched to the exact year, model, and position shown in the fitment data: Fits 2008-2011 Mercedes-Benz C300, right; Fits 2008-2011 Mercedes-Benz C350, right; Fits 2010-2011 Mercedes-Benz E350, right.

Quality Assurance

AP Exhaust manufactures this converter as a Federal / EPA direct-fit replacement with a ceramic substrate and application-specific sensor provisions. The boxed packaging helps protect the unit during handling and storage.