AP Exhaust 644093 Catalytic Converter - Rear

AP Exhaust 644093 Catalytic Converter

AP Exhaust 644093 is a Federal / EPA direct-fit catalytic converter built for exact OE dimensions and fitment. It uses a ceramic substrate inside a stainless steel body, with welded flange connections and one O2 sensor port for a clean replacement on select Buick Verano applications.

Key Features

• Federal / EPA direct-fit catalytic converter
• Stainless steel body construction
• Ceramic substrate material
• 3-bolt welded flange inlet
• 2-bolt welded flange outlet
• One O2 sensor port
• Inlet gasket and outlet gasket included
• Overall length: 38 inches

Detailed Description

Built by AP Exhaust under the ARISTO manufacturing platform, part number 644093 uses proprietary substrate chemistry to support efficient catalyst loading and lower production cost while maintaining converter efficiency. Automated workstations, spinner welding equipment, and high-speed production lines are used to hold OE-style dimensions and fitment consistency. This makes AP Exhaust 644093 a direct replacement choice for 2012-2017 Buick Verano models listed below, including rear-position applications.

This part cross-references Monroe Shocks & Struts (e.g., 23160261) for the same application.

Vehicle Fitment

• Fits 2012-2017 Buick Verano, N/A. Direct Fit; Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
• Fits 2012-2017 Buick Verano, Rear. Direct Fit; Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.

Installation Notes and Tips

Verify the vehicle’s emissions configuration before ordering, since this converter is listed for Federal and California emissions applications but is restricted for use on vehicles licensed in CA, CO, ME, and NY. Confirm inlet and outlet flange style, O2 sensor port location, and overall length against the original exhaust component before installation. Use the included inlet and outlet gaskets during assembly and inspect mating surfaces for corrosion or distortion.

Quality Assurance

AP Exhaust uses automated manufacturing processes and OE-dimensioned construction to support consistent fitment and repeatable converter build quality. The stainless steel body and ceramic substrate are selected for exhaust-system durability and emissions service requirements.