MagnaFlow 5491159 Catalytic Converter - Rear

CARB-Compliant Direct-Fit Converter

MagnaFlow 5491159 is a direct-fit catalytic converter built for specific Subaru applications and designed to help keep the check engine light off. It uses stainless steel construction, mandrel-bent tubing, and a ceramic substrate to support proper exhaust flow and corrosion resistance.

This MagnaFlow California Grade converter is part of the Direct-Fit CALIFORNIA OBDII CONVERTERS line, which focuses on OE-style fitment for emissions-controlled vehicles. Using 3D scanning in the design process, the part is engineered to match original equipment fit and function for the listed Subaru Forester and Subaru Outback applications.

Key Features

• Direct-fit design for bolt-on installation
• CARB-compliant for legal use in California and CARB-restricted states on listed vehicles
• Stainless steel body and tubing for corrosion resistance
• Mandrel-bent tubing to reduce exhaust flow restriction
• Ceramic substrate with pre-converter oxygen sensor location
• Gaskets and hangers included for installation support
• Specific-fit replacement for rear position applications

Vehicle Fitment

• Fits 2013 Subaru Forester, rear.
• Fits 2012 Subaru Forester, rear.
• Fits 2011 Subaru Forester, rear.
• Fits 2010 Subaru Forester, rear.
• Fits 2009 Subaru Forester, rear.
• Fits 2009 Subaru Outback, rear.
• Fits 2008 Subaru Outback, rear.

Detailed Description

MagnaFlow 5491159 is a rear catalytic converter for 2008-2013 Subaru Forester and 2008-2009 Subaru Outback applications listed with CARB Executive Order D-193-146. It features a 2.5-inch inlet and outlet, bolt-on connections, an oval stainless steel body, and a ceramic substrate for emissions service. The direct-fit layout helps simplify replacement while avoiding cutting or welding.

This part cross-references Walker (e.g., 16469, 16470) for the same application.

What It Helps Address

• Check engine light concerns related to catalytic converter efficiency
• Failed emissions inspection due to a worn or restricted converter
• Exhaust leaks at the converter connection points
• Corrosion damage on factory exhaust components
• Reduced exhaust flow caused by an aging converter substrate

Installation Notes and Tips

Installation is straightforward with the proper tools and does not require cutting or welding. The included gaskets and hangers help reduce the chance of a leaking seal and eliminate the need to reuse corroded factory hardware. Confirm the vehicle’s engine family and CARB Executive Order listing before installation, especially for California and other CARB-restricted states.

Quality Assurance

MagnaFlow uses 3D scanning and metrology-based design validation to match OE fit and function for the listed applications. This converter is built to meet or exceed California Air Resources Board requirements and has undergone additional testing for CARB compliance on the specified Subaru models.