Catalytic Converter for Lexus IS350 (2006-2013) 3.5L

Direct-Fit Catalytic Converter for 2006-2013 Lexus IS (GSE21)

What it Does: The Direct-Fit Catalytic Converter replaces degraded factory exhaust catalysts on the 2006-2013 IS to restore factory exhaust scavenging, maintain OBD II emissions compliance, and clear catalyst efficiency fault codes.

The Stock Lexus IS Catalyst Degradation

Over extended heat cycles and high-mileage operation, the factory ceramic substrate inside the GSE21 exhaust assembly experiences thermal degradation and washcoat depletion. This structural breakdown restricts exhaust velocity, promotes internal core fracturing, and diminishes precious metal catalytic activity. Once conversion efficiency drops below the factory ECM threshold, downstream oxygen sensors trigger recurring P0420 and P0430 diagnostic trouble codes, compromising engine management trimming and leading to failed state tailpipe and OBD II inspections.

The Engineering Solution

Constructed with a heavy-gauge stainless steel outer shell and tubing, this direct-fit replacement converter withstands severe exhaust gas temperatures and external corrosion. The internal high-flow ceramic substrate features an optimized precious-metal washcoat formulated for reliable hydrocarbon, carbon monoxide, and NOx reduction. Precision 2-bolt welded flanges, factory-positioned O2 sensor bungs, and OE-spec pipe routing eliminate exhaust leaks, ensuring a leak-free seal without custom fabrication, pipe expansion, or ECU recalibration.

What's Included

• 1 Set Catalytic Converter
• Installation Accessories (Mounting Hardware & Gaskets)

Technical Specifications

Compatibility

• 2006 Lexus IS350 3.5L V6
• 2007 Lexus IS350 3.5L V6
• 2008 Lexus IS350 3.5L V6
• 2009 Lexus IS350 3.5L V6
• 2010 Lexus IS350 3.5L V6
• 2011 Lexus IS350 3.5L V6
• 2012 Lexus IS350 3.5L V6
• 2013 Lexus IS350 3.5L V6

Frequently Asked Questions & Fitment Warnings

Does this fit the GSE21 IS?

Yes, this is a direct fit for the 2006-2013 Lexus IS equipped with the 2GR-FSE engine. Non-CARB compliant: Not legal for sale, installation, or use on licensed vehicles in California, New York, Colorado, or Maine.

Are gaskets and hardware included with this assembly?

Yes, this converter package includes the required installation accessories and mounting hardware for complete bolt-on installation.

The Lexus Standard

Maintain the signature smooth V6 acoustic profile and factory engine responsiveness of your JDM sports sedan while ensuring clean tailpipe emissions and zero check engine lights.