AP Exhaust 645239 Catalytic Converter - Rear

AP Exhaust 645239 Catalytic Converter

AP Exhaust 645239 is a Federal / EPA direct-fit catalytic converter built for the rear position on select Lexus RX350 models. It uses a stainless steel body, a ceramic substrate, and OE-style dimensions to support proper fitment on 2010-2015 Lexus RX350 applications.

Fits 2010-2015 Lexus RX350, rear. This AP Exhaust catalytic converter is built to match the vehicle’s original undercar layout and exhaust connection points for a direct replacement on the specified application.

Key Features

• Federal / EPA direct-fit undercar catalytic converter
• Stainless steel body for corrosion resistance
• Ceramic substrate material
• 2-bolt welded flange inlet and outlet design
• Inlet gasket, outlet gasket, inlet hardware, and outlet hardware listed in the product data
• No O2 sensor ports
• Overall length: 23.625 in. / 23.63 in.
• Built to OE dimensions and fitment standards

Detailed Description

AP Exhaust part number 645239 uses ARISTO substrate chemistry and AP Emissions Technologies manufacturing methods to deliver a direct-fit replacement with controlled loading and consistent converter efficiency. The stainless steel construction and OE-style flange layout support a clean installation on the rear exhaust section of the Lexus RX350. This part cross-references Monroe Shocks & Struts (e.g., 174200P110) for the same application.

Compatible with 2010-2015 Lexus RX350 rear exhaust applications, AP Exhaust 645239 is intended for vehicles with Federal and California emissions configurations as listed in the fitment data. Check local emissions rules before installation, since restrictions apply in CA, CO, ME, and NY.

What It Helps Address

• Failed catalytic converter efficiency codes
• Exhaust restriction from a deteriorated substrate
• Emissions test failure related to rear converter performance
• Exhaust leaks at the converter flange connection
• Fitment issues caused by a damaged or non-OE-style replacement converter

Installation Notes

Verify the rear position, flange style, and overall length before installation. This converter uses a 2-bolt welded flange inlet and outlet, with no O2 sensor ports, so sensor placement must match the vehicle’s existing exhaust configuration. Confirm emissions compliance for your state before use on a 2010-2015 Lexus RX350.

Quality Assurance

AP Exhaust uses automated workstations, spinner welding equipment, and high-speed production lines to build converters to exact OE dimensions and fitment. The ARISTO substrate chemistry and stainless steel construction are used to support consistent manufacturing quality and converter efficiency.