AP Exhaust 642889 Catalytic Converter - Rear

OE-Fit Catalytic Converter for Prius

AP Exhaust 642889 is a Federal / EPA direct-fit catalytic converter built for precise OE dimensions and fitment. It uses a stainless steel body with a ceramic substrate and one O2 sensor port, making it a practical replacement for select Toyota Prius and Prius V applications.

Key Features

• Federal / EPA direct-fit design for select Toyota Prius and Prius V models
• Stainless steel body for corrosion resistance
• Ceramic substrate material for emissions conversion performance
• 2-bolt welded flange with flare inlet for OE-style connection
• 2.23" OD pipe outlet
• One O2 sensor port
• Overall length: 21.13 inches
• Inlet gasket included; outlet gasket not required

Fitment Details

• Fits 2010-2015 Toyota Prius, N/A. Direct Fit; Semi-Direct Fit, vehicles with heat exchanger but not included. Cut as close to heat exchanger as possible. Federal and California emissions. Not for sale or use on vehicles licensed in CA, CO, ME, and NY. Restrictions may apply in other states.
• Fits 2010-2015 Toyota Prius, Rear. Direct Fit; Semi-Direct Fit, vehicles with heat exchanger but not included. Cut as close to heat exchanger as possible. Federal and California emissions. Not for sale or use on vehicles licensed in CA, CO, ME, and NY. Restrictions may apply in other states.
• Fits 2012-2014 Toyota Prius V, Rear. Direct Fit; Semi-Direct Fit, vehicles with heat exchanger but not included. Cut as close to heat exchanger as possible. Federal and California emissions. Not for sale or use on vehicles licensed in CA, CO, ME, and NY. Restrictions may apply in other states.

What This Part Helps Address

• Failed catalytic converter emissions testing
• Check engine light concerns related to catalyst efficiency
• Exhaust leaks at the converter connection points
• Restricted exhaust flow from a worn or damaged converter
• Replacement needs for a direct-fit Toyota Prius catalytic converter

Installation Notes

Verify the vehicle’s emissions configuration before ordering. This converter is listed for Prius and Prius V applications with heat exchanger notes, and the heat exchanger is not included. Follow the cut location guidance closely and confirm O2 sensor port placement, inlet style, and outlet dimensions before installation. AP Exhaust 642889 is also referenced for the same application under cross-reference part numbers 172286 and 182286.

Quality Assurance

AP Emissions Technologies uses automated workstations, spinner welding equipment, and high-speed production lines to build converters to exact OE dimensions and fitment. The ARISTO substrate chemistry is engineered for efficient loading and converter performance while supporting competitive manufacturing consistency.