AP Exhaust 643143 Catalytic Converter - Rear
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AP Exhaust

AP Exhaust 643143 Catalytic Converter - Rear

Brand AP Exhaust 643143
Position Rear
Clamp Qty 1
Inlet Gasket Qty 1
Inlet Hardware None
Inlet Type A 3 bolt welded flange
O2 Sensor Ports None
Outlet Gasket Qty 1
Outlet Hardware Yes
Outlet Type A 2 bolt welded flange
Overall Length (IN) 60
Substrate Material Ceramic
Type Federal / epa direct-fit
Fits Subaru · 16 vehicles

Federal / EPA direct-fit. Built to OE dimensions for straightforward installation.

Ceramic substrate. Proprietary chemistry delivers efficient converter performance.

Welded flange design. Engineered for a secure, factory-style exhaust connection.

Cross-references 1740236010 for the same application. See all 1.

$279.53Free shipping
In stock · usually ships same day before 1pm CST
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Order total $279.53
Free shipping to the continental U.S.
Free returns within 60 days if it doesn't fit when fitment is verified.
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AP Exhaust 643143 Catalytic Converter

AP Exhaust 643143 is a Federal / EPA direct-fit catalytic converter built for rear-position applications on select Subaru Legacy and Subaru Outback models. It uses a ceramic substrate and OE-style dimensions to support proper fitment on 2013-2019 Subaru Legacy and 2013-2019 Subaru Outback applications.

Key Features

  • Federal / EPA direct-fit catalytic converter
  • Ceramic substrate material for emissions conversion performance
  • Built to exact OE dimensions for fitment consistency
  • Rear position application
  • 3-bolt welded flange inlet and 2-bolt welded flange outlet
  • Overall length: 60 in.
  • Inlet gasket and outlet gasket specified for the application
  • Outlet hardware included; inlet hardware not included
  • No O2 sensor ports

Fitment Details

  • Fits 2013-2019 Subaru Legacy, rear. Direct Fit; 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 2013-2019 Subaru Outback, rear. Direct Fit; 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 2013-2014 Subaru Outback, rear. Direct Fit; Federal 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 emissions testing caused by a worn or inefficient converter
  • Check engine light concerns related to catalytic converter efficiency
  • Exhaust restriction from a damaged or deteriorated converter
  • Fitment issues when replacing an OE-style rear converter on Subaru Legacy or Subaru Outback models

Installation Notes

Verify the vehicle’s emissions configuration before ordering, since coverage differs by model year and emissions package. This part uses a 3-bolt welded flange inlet and a 2-bolt welded flange outlet, with no O2 sensor ports. Confirm rear-position placement and compare the existing converter to AP Exhaust 643143 before installation.

Quality Assurance

AP Exhaust uses proprietary substrate chemistry and advanced manufacturing methods, including automated workstations, spinner welding equipment, and high-speed production lines, to build converters to OE dimensions and fitment standards. This part cross-references Monroe Shocks & Struts (e.g., 1740236010) for the same application.

Related reading

This part fits 16 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelLitersCylindersPositionNotes
2019SubaruLegacy2.5LH4RearDirect 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.
2019SubaruOutback2.5LH4RearDirect 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.
2018SubaruLegacy2.5LH4RearDirect 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.
2018SubaruOutback2.5LH4RearDirect 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.
2017SubaruLegacy2.5LH4RearDirect 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.
2017SubaruOutback2.5LH4RearDirect 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.
2016SubaruLegacy2.5LH4RearDirect 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.
2016SubaruOutback2.5LH4RearDirect 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.
2015SubaruLegacy2.5LH4RearDirect 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.
2015SubaruOutback2.5LH4RearDirect 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.
2014SubaruLegacy2.5LH4RearDirect 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.
2014SubaruOutback2.5LH4RearDirect Fit; (13-14); Federal Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME and NY. Restrictions may apply in other states. Check with your state authority for details.
2014SubaruOutback2.5LH4RearDirect 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.
2013SubaruLegacy2.5LH4RearDirect 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.
2013SubaruOutback2.5LH4RearDirect Fit; (13-14); Federal Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME and NY. Restrictions may apply in other states. Check with your state authority for details.
2013SubaruOutback2.5LH4RearDirect 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.
Directly replaces or cross-references 1 part number
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
1740236010