AP Exhaust 644076 Catalytic Converter - Rear

Direct-Fit Catalytic Converter for Encore and Trax

AP Exhaust 644076 is a Federal / EPA direct-fit catalytic converter built for specific Buick Encore and Chevrolet Trax applications. It uses a stainless steel body and OE-style dimensions to support proper exhaust alignment and dependable fitment on the listed vehicles.

The AP Exhaust Direct Fit Converter line focuses on exact OE dimensions and consistent manufacturing control. For buyers searching for a Buick Encore catalytic converter or Chevrolet Trax rear catalytic converter, this part number 644076 is built to match the original layout without requiring custom fabrication.

Key Features

• Federal / EPA direct-fit catalytic converter
• Stainless steel body for exhaust system durability
• 2-bolt welded flange inlet for OE-style connection
• 2.38 in. OD pipe outlet
• No O2 sensor ports
• Overall length: 17.875 in.
• AP Exhaust part number 644076

Product Details

This AP Exhaust catalytic converter is engineered for direct replacement on select Buick Encore and Chevrolet Trax models. The converter uses AP Emissions Technologies manufacturing methods and proprietary substrate chemistry to support efficient exhaust treatment while maintaining OE dimensions for fitment. The result is a replacement converter that aligns with the factory exhaust path on the listed rear applications and Federal / California emissions configurations where noted.

Compatible applications include Fits 2021-2022 Buick Encore, N/A, Fits 2022 Chevrolet Trax, N/A, Fits 2015-2021 Chevrolet Trax, Rear, and Fits 2013-2020 Buick Encore, Rear. This part cross-references 95468206 for the same application. AP Exhaust 644076 is a practical choice when replacing a worn or restricted converter on these vehicles.

What It Helps Address

• Check engine light related to catalyst efficiency faults
• Restricted exhaust flow from a failing converter
• Exhaust odor caused by a damaged catalyst
• Emissions test failure tied to converter performance
• Fitment issues from a rusted or damaged OE converter

Installation Notes

Verify the vehicle’s emissions configuration and position before ordering. This converter is listed for Federal and California emissions on the specified applications, but some rear-fit applications are not for sale or use on vehicles licensed in CA, CO, ME, and NY; check local regulations before installation. The inlet uses a 2-bolt welded flange, the outlet is a 2.38 in. OD pipe, and no inlet or outlet hardware is listed. Confirm the existing exhaust layout and sensor placement, since this unit does not include O2 sensor ports.

Quality Assurance

AP Exhaust uses automated workstations, spinner welding equipment, and high-speed production lines to build converters to exact OE dimensions and fitment. The Direct Fit Converter line is produced with controlled manufacturing processes to support consistent installation and exhaust system alignment.