Catalytic Converter for Lexus GS350 (2007-2015) 3.5L AWD Bank 1 & Bank 2

Direct-Fit Manifold Catalytic Converter Set for 2007-2015 Lexus GS350 (S190 / L10)

What it Does: The catalytic converter set replaces worn or clogged factory exhaust manifold converters on the 2007-2015 Lexus GS350 AWD to eliminate P0420/P0430 diagnostic trouble codes and restore exhaust scavenging efficiency.

The Stock Lexus GS350 Washcoat Degradation & Thermal Fatigue

With prolonged heat cycling and high mileage, factory manifold converters on the 2GR-FSE suffer washcoat sintering and ceramic substrate attrition. Oil blow-by and cold-start thermal shock erode the internal platinum-group precious metal catalyst layer, dropping oxygen storage capacity below OEM threshold limits. This triggers persistent Check Engine Lights (CEL) for catalyst efficiency below threshold (Bank 1 / Bank 2), restricts exhaust scavenging along the tight AWD front subframe clearance, and increases backpressure against the cylinder head exhaust ports.

The Engineering Solution

Engineered explicitly for all-wheel-drive clearances, this direct-fit Bank 1 and Bank 2 manifold assembly is fabricated from corrosion-resistant 409 stainless steel tubing to resist road-salt exposure and thermal oxidation. Dense, flow-optimized ceramic honeycombs loaded with catalytic washcoat restore precise stoichiometric gas conversion without compromising exhaust velocity. Heavy-gauge laser-cut flanges prevent thermal warping at the cylinder head interface, while factory-located O2 sensor bungs allow plug-and-play downstream sensor transfer without wire harness tension or secondary bung modification.

Technical Specifications

Compatibility

• 2007-2011 Lexus GS350 3.5L V6 AWD (Chassis: GRS196)
• 2013-2015 Lexus GS350 3.5L V6 AWD (Chassis: GRL15)
• Fits AWD manifold bank 1 (right) and bank 2 (left) applications only

Frequently Asked Questions

Does this fit the S190 / L10 GS350?

Yes, this is a direct fit for the 2007-2015 Lexus GS350 equipped with the 2GR-FSE engine and all-wheel-drive configuration.

Are these converters legal for road use in California or CARB-compliant states?

No, this unit is 46-state EPA compliant and cannot be sold, shipped, or registered in California, New York, Colorado, or Maine.

The Lexus Precision Standard

Preserve factory Japanese domestic refinement and exhaust acoustic tuning without harsh cabin drone or restrictive backpressure chokes, keeping your AWD luxury sport sedan running cleanly and reliably.