AP Exhaust 771519 Catalytic Converter - Front

CARB-Compliant Direct-Fit Converter

AP Exhaust 771519 is a CARB compliant direct-fit catalytic converter built for the front position on select Buick Lucerne applications. It is engineered with a stainless steel body, ceramic substrate, and OE-matched dimensions to support proper fitment on California-emissions vehicles.

For 2009-2011 Buick Lucerne front applications, this converter is built to align with the original exhaust layout and emissions requirements. The AP Exhaust 771519 also uses a 2-bolt welded flange inlet and outlet, includes one O2 sensor port, and is backed by California Executive Order D-798-9.

Key Features

• Direct-fit catalytic converter for the front exhaust position
• CARB compliant with Executive Order D-798-9
• Stainless steel body for corrosion resistance
• Ceramic substrate material
• 2-bolt welded flange inlet and outlet
• One O2 sensor port
• Inlet gasket and outlet gasket included
• Overall length: 26 inches

Product Details

The AP Exhaust 771519 is part of the 9GMXV03.9055 product line, which uses AP Emissions Technologies manufacturing methods to maintain OE-style dimensions and fitment consistency. That includes automated production processes and welded construction intended to keep the converter aligned with the original exhaust routing on the Buick Lucerne. This part number is also referenced as 771519 for ordering and catalog lookup.

Compatible With 2009 Buick Lucerne, front; 2010 Buick Lucerne, front; and 2011 Buick Lucerne, front. This part number 771519 is a direct-fit solution for California emissions applications on the Buick Lucerne front exhaust location.

What It Helps Address

• Failed catalytic converter emissions testing
• Check engine light concerns related to catalyst efficiency
• Exhaust restriction caused by a worn or damaged converter
• Fitment issues from non-direct-fit replacement parts
• California emissions compliance needs for the front converter location

Installation Notes

Verify the vehicle’s emissions label and confirm California application requirements before installation. This converter uses 2-bolt welded flange connections at both ends and includes one O2 sensor port, so the existing exhaust and sensor layout should be checked against the vehicle before service. The included inlet and outlet gaskets support installation, while inlet and outlet hardware are not included.

Quality Assurance

AP Exhaust builds this converter to exact OE dimensions using stainless steel construction and a ceramic substrate for consistent fitment and emissions performance. It carries California Executive Order D-798-9 for the listed Buick Lucerne applications.