MagnaFlow 551401 Catalytic Converter - Front or Front Left

California OBDII Direct-Fit Converter

MagnaFlow 551401 is a California Grade, CARB-compliant direct-fit catalytic converter built for specific Buick, Cadillac, and Chevrolet applications. It uses stainless steel construction, a ceramic substrate, and a bolt-on inlet design to replace the original unit without cutting or welding.

Designed for the 2010 Buick LaCrosse front left position and other listed applications, this MagnaFlow Direct-Fit CALIFORNIA OBDII CONVERTERS part is shaped to match OE fitment and function. The spun-body design, single laser fusion weld, and compact low-mass layout are engineered for leak resistance and thermal efficiency.

Key Features

• MagnaFlow part number 551401
• Direct-fit catalytic converter for specific OE-style replacement
• California Grade CARB compliant for listed vehicles
• Stainless steel body and tubing for corrosion resistance
• Ceramic substrate material
• Bolt-on inlet for straightforward installation
• Mounting hardware included
• Single converter quantity

Fitment Details

• Fits 2013-2019 Cadillac XTS, Front Left
• Fits 2014-2017 Chevrolet Impala, Front Left
• Fits 2012-2015 Buick LaCrosse, Front
• Fits 2010 Buick LaCrosse, Front Left; Certification Level: LEV2 ULEV; CARB Executive Order D-193-133; Engine Family Number AGMXJ03.0157

What It Helps Address

• Check engine light caused by a failed catalytic converter
• Emissions test failure from a worn or restricted converter
• Exhaust leaks at the converter body or weld area
• Corrosion-related replacement needs on factory exhaust parts
• Fitment issues from using a non-direct replacement

Installation Notes

This converter is designed for direct replacement on the listed vehicles, including the 2010 Buick LaCrosse front left application. Use the proper tools for installation; no cutting or welding is required. Verify the vehicle’s emissions certification and position before ordering, since CARB compliance applies only to the listed fitments.

Quality Assurance

MagnaFlow uses 3D scanning during development to match OE dimensions and function. The spun-body construction and laser fusion weld are used to reduce leak potential, and the design is built to meet or exceed California Air Resources Board requirements for the approved applications. This part cross-references OE-style replacement needs for the same application.