AP Exhaust 645144 Catalytic Converter - Rear

AP Exhaust Direct Fit Converter for GS350

AP Exhaust Part Number 645144 is a Federal / EPA direct-fit undercar catalytic converter for the rear position on select Lexus GS350 applications. It is built for 2013-2015 Lexus GS350 models with Federal and California emissions, giving you a direct-fit replacement path for the factory exhaust layout.

Key Features

• Federal / EPA direct-fit undercar catalytic converter
• Rear position application for Lexus GS350
• One inlet and one outlet configuration
• Flange inlet connection and pipe outlet connection
• Fits 2013-2015 Lexus GS350, rear
• AP Exhaust 645144 for direct replacement use

Product Details

The AP Exhaust Direct Fit Converter line is built for vehicle-specific exhaust service, with application-matched fitment and connection points that simplify replacement of the rear catalytic converter assembly. This AP Exhaust 645144 unit is specified for 2013-2015 Lexus GS350 models in the rear position and is listed for Federal and California emissions configurations. For buyers searching for a 2013-2015 Lexus GS350 rear catalytic converter or AP Exhaust 645144 direct-fit converter, this part matches the documented application without requiring a universal-style setup.

What It Helps Address

• Failed rear catalytic converter on a 2013-2015 Lexus GS350
• Exhaust restriction caused by a worn or damaged converter
• Check engine light concerns related to converter efficiency
• Exhaust leaks at the converter connection points
• Emissions inspection failures tied to the rear converter assembly

Installation Notes and Tips

Confirm the vehicle is a 2013-2015 Lexus GS350 with the rear converter application before ordering. This part uses a flange inlet and pipe outlet, so the existing exhaust connections should be inspected for corrosion, distortion, or damage before installation. Verify Federal or California emissions configuration against the vehicle’s original exhaust setup and compare the removed converter to the replacement part for fitment confirmation.

Quality Assurance

AP Exhaust 645144 is a direct-fit catalytic converter from the AP Exhaust Direct Fit Converter line, built for application-specific exhaust replacement. This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.