AP Exhaust 643142 Catalytic Converter - Rear

Brand	AP Exhaust 643142
Position	Rear
Body Material	Stainless steel
Inlet Gasket	Yes
Inlet Gasket Qty	1
Inlet Hardware	None
Inlet Type A	3 bolt welded flange
O2 Sensor Ports	2
O2 Sensor Ports	None
Outlet Gasket	Yes
Outlet Gasket Qty	1
Outlet Hardware	Yes
Outlet Type A	2 bolt welded flange w/ gasket stub
Overall Length (IN)	60
Substrate Material	Ceramic
Type	Federal / epa direct-fit
Product line	Direct Fit Converter
Fits	Subaru · 56 vehicles

Direct-fit converter. Built to exact OE dimensions for straightforward installation.

Stainless steel body. Helps resist corrosion in demanding exhaust conditions.

Ceramic substrate. Proprietary chemistry promotes efficient converter performance.

Cross-references 44620AC860 for the same application. See all 1.

$259.29Free shipping

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AP Exhaust Direct Fit Converter for Subaru

AP Exhaust Direct Fit Converter 643142 is a Federal / EPA direct-fit catalytic converter built for Subaru applications that require OE-style dimensions and fitment. It uses a ceramic substrate and stainless steel body construction to support efficient exhaust flow and emissions control on the listed Legacy, Outback, Forester, Crosstrek, Impreza, and XV Crosstrek applications.

The AP Exhaust Direct Fit Converter line focuses on exact OE dimensions and fitment, using advanced manufacturing methods to help maintain consistent build quality across production. For Subaru owners searching for a direct fit catalytic converter for 2011-2019 Subaru Forester, 2015-2019 Subaru Legacy, or 2016-2017 Subaru Crosstrek, part number 643142 is built for the listed rear and non-position-specific applications.

Key Features

Federal / EPA direct-fit catalytic converter
Stainless steel body material for corrosion resistance
Ceramic substrate material
3-bolt welded flange inlet design
2-bolt welded flange outlet with gasket stub
Inlet gasket and outlet gasket included in the design
Two O2 sensor ports
Overall length: 60 inches
Built to OE dimensions for listed Subaru fitments

Detailed Description

AP Exhaust 643142 is engineered as a direct replacement catalytic converter for specific Subaru exhaust configurations. It is listed for 2015-2019 Subaru Legacy, rear; 2015-2019 Subaru Outback, rear; 2014-2018 Subaru Forester; 2011-2018 Subaru Forester, rear; 2016-2017 Subaru Crosstrek; 2016-2017 Subaru Crosstrek, rear; 2012-2016 Subaru Impreza, rear; 2012-2016 Subaru Impreza; 2013-2015 Subaru XV Crosstrek; 2013-2015 Subaru XV Crosstrek, rear; and 2011-2013 Subaru Forester, rear. This part cross-references Subaru 44620AC860 for the same application.

Part number 643142 uses a ceramic substrate inside a stainless steel shell to support emissions conversion while maintaining the direct-fit geometry needed for Subaru Legacy, Outback, Forester, Crosstrek, Impreza, and XV Crosstrek exhaust systems. The AP Exhaust Direct Fit Converter product line is built around OE-style dimensions and fitment, which helps simplify replacement on the listed Federal and California emissions applications.

Common Issues This Part Can Address

Failed catalytic converter efficiency codes on the listed Subaru applications
Exhaust restriction caused by a worn or damaged converter
Emissions test failure related to converter performance
Exhaust leaks at the converter flange connections
Check engine light concerns tied to catalyst monitoring

Installation Notes and Tips

Verify the vehicle’s year, model, position, and emissions configuration before ordering.
Confirm the listed rear or non-position-specific application matches the original converter location.
Inspect flange surfaces, gaskets, and O2 sensor connections during installation.
Check local emissions regulations before use; some listed applications are not for sale or use on vehicles licensed in CA, CO, ME, and NY.
Use the vehicle’s existing exhaust layout and sensor placement as the reference for fitment.

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 used in the Direct Fit Converter line is designed to support efficient catalyst loading and consistent converter performance across the listed Subaru applications.

This part fits 56 vehicles

Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

Year	Make	Model	Submodel	Body Type	Liters	Cylinders	Fuel Type	Position	Notes
2019	Subaru	Legacy	—	—	2.5L	H4	—	Rear	Federal and California Emissions; Direct Fit Converter
2019	Subaru	Outback	—	—	2.5L	H4	—	Rear	Federal and California Emissions; Direct Fit Converter
2018	Subaru	Forester	—	—	2.5L	H4	—	N/A	Direct Fit; Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
2018	Subaru	Forester	—	—	2.5L	H4	—	Rear	Direct Fit; Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
2018	Subaru	Legacy	—	—	2.5L	H4	—	Rear	Federal and California Emissions; Direct Fit Converter
2018	Subaru	Outback	—	—	2.5L	H4	—	Rear	Federal and California Emissions; Direct Fit Converter
2017	Subaru	Crosstrek	—	—	2.0L	H4	GAS	N/A	Direct Fit; Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
2017	Subaru	Crosstrek	—	—	2.0L	H4	—	Rear	Direct Fit; Rear; Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
2017	Subaru	Forester	—	—	2.5L	H4	—	N/A	Direct Fit; Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
2017	Subaru	Forester	—	—	2.5L	H4	—	Rear	Direct Fit; Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
2017	Subaru	Legacy	—	—	2.5L	H4	—	Rear	Federal and California Emissions; Direct Fit Converter
2017	Subaru	Outback	—	—	2.5L	H4	—	Rear	Federal and California Emissions; Direct Fit Converter
2016	Subaru	Crosstrek	—	—	2.0L	H4	GAS	N/A	Direct Fit; Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
2016	Subaru	Crosstrek	—	—	2.0L	H4	—	Rear	Direct Fit; Rear; Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
2016	Subaru	Forester	—	—	2.5L	H4	—	N/A	Direct Fit; Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
2016	Subaru	Forester	—	—	2.5L	H4	—	Rear	Direct Fit; Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
2016	Subaru	Impreza	—	Hatchback	2.0L	H4	—	Rear	Direct Fit; Rear; Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
2016	Subaru	Impreza	—	—	2.0L	H4	—	Rear	Direct Fit; Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
2016	Subaru	Legacy	—	—	2.5L	H4	—	Rear	Federal and California Emissions; Direct Fit Converter
2016	Subaru	Outback	—	—	2.5L	H4	—	Rear	Federal and California Emissions; Direct Fit Converter
2015	Subaru	Forester	—	—	2.5L	H4	—	N/A	Direct Fit; Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
2015	Subaru	Forester	—	—	2.5L	H4	—	Rear	Direct Fit; Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
2015	Subaru	Impreza	—	Hatchback	2.0L	H4	—	Rear	Direct Fit; Rear; Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
2015	Subaru	Impreza	—	—	2.0L	H4	—	Rear	Direct Fit; Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
2015	Subaru	Legacy	—	—	2.5L	H4	—	Rear	Federal and California Emissions; Direct Fit Converter
2015	Subaru	Outback	—	—	2.5L	H4	—	Rear	Federal and California Emissions; Direct Fit Converter
2015	Subaru	XV Crosstrek	—	—	2.0L	H4	—	N/A	Direct Fit; Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
2015	Subaru	XV Crosstrek	—	—	2.0L	H4	—	Rear	Direct Fit; Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
2014	Subaru	Forester	—	—	2.5L	H4	—	N/A	Direct Fit; Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
2014	Subaru	Forester	—	—	2.5L	H4	—	Rear	Direct Fit; Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
2014	Subaru	Impreza	—	Hatchback	2.0L	H4	—	Rear	Direct Fit; Rear; Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
2014	Subaru	Impreza	—	—	2.0L	H4	—	Rear	Direct Fit; Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
2014	Subaru	XV Crosstrek	—	—	2.0L	H4	—	N/A	Direct Fit; Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
2014	Subaru	XV Crosstrek	—	—	2.0L	H4	—	Rear	Direct Fit; Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
2013	Subaru	Forester	X Convenience	—	2.5L	H4	—	Rear	Direct Fit; (11-13); Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
2013	Subaru	Forester	X Limited	—	2.5L	H4	—	Rear	Direct Fit; (11-13); Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
2013	Subaru	Forester	X Premium	—	2.5L	H4	—	Rear	Direct Fit; (11-13); Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
2013	Subaru	Forester	X Touring	—	2.5L	H4	—	Rear	Direct Fit; (11-13); Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
2013	Subaru	Forester	X	—	2.5L	H4	—	Rear	Direct Fit; (11-13); Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
2013	Subaru	Forester	—	—	2.5L	H4	—	Rear	Direct Fit; Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
2013	Subaru	Impreza	—	Hatchback	2.0L	H4	—	Rear	Direct Fit; Rear; Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
2013	Subaru	Impreza	—	—	2.0L	H4	—	Rear	Direct Fit; Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
2013	Subaru	XV Crosstrek	—	—	2.0L	H4	—	N/A	Direct Fit; Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
2013	Subaru	XV Crosstrek	—	—	2.0L	H4	—	Rear	Direct Fit; Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
2012	Subaru	Forester	X	—	2.5L	H4	—	Rear	Direct Fit; (11-13); Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
2012	Subaru	Forester	X Premium	—	2.5L	H4	—	Rear	Direct Fit; (11-13); Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
2012	Subaru	Forester	X Touring	—	2.5L	H4	—	Rear	Direct Fit; (11-13); Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
2012	Subaru	Forester	X Limited	—	2.5L	H4	—	Rear	Direct Fit; (11-13); Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
2012	Subaru	Forester	—	—	2.5L	H4	—	Rear	Direct Fit; Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
2012	Subaru	Impreza	—	Hatchback	2.0L	H4	—	Rear	Direct Fit; Rear; Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
2012	Subaru	Impreza	—	—	2.0L	H4	—	Rear	Direct Fit; Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
2011	Subaru	Forester	X Premium	—	2.5L	H4	—	Rear	Direct Fit; (11-13); Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
2011	Subaru	Forester	X Touring	—	2.5L	H4	—	Rear	Direct Fit; (11-13); Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
2011	Subaru	Forester	X Limited	—	2.5L	H4	—	Rear	Direct Fit; (11-13); Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
2011	Subaru	Forester	X	—	2.5L	H4	—	Rear	Direct Fit; (11-13); Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
2011	Subaru	Forester	—	—	2.5L	H4	—	Rear	Direct Fit; Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
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Directly replaces or cross-references 1 part number

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.

44620AC860