AP Exhaust 643146 Catalytic Converter - Rear
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AP Exhaust

AP Exhaust 643146 Catalytic Converter - Rear

Brand AP Exhaust 643146
Position Rear
Clamp Qty None
Inlet Type A 3 bolt welded flange
Outlet Type A 2 bolt welded flange
Overall Length (IN) 58.5
Substrate Material Ceramic
Type Federal / epa direct-fit
Fits Subaru · 9 vehicles

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

Ceramic substrate. Proprietary chemistry delivers efficient loading and better converter efficiency.

Welded flange ends. 3-bolt inlet and 2-bolt outlet connections for a secure exhaust seal.

Cross-references 44620AC10A for the same application. See all 1.

$327.82Free shipping
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AP Exhaust 643146 Catalytic Converter

AP Exhaust 643146 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 flange connections to support proper exhaust flow and factory-style fitment.

Key Features

  • Federal / EPA direct-fit catalytic converter
  • Ceramic substrate material for emissions control performance
  • 3-bolt welded flange inlet and 2-bolt welded flange outlet
  • Overall length: 58.5 inches
  • Built to OE dimensions for rear exhaust placement
  • AP Exhaust part number 643146

Detailed Description

This AP Exhaust catalytic converter is engineered for direct replacement on 2010-2012 Subaru Legacy rear applications and 2010-2012 Subaru Outback rear applications with Federal emissions equipment. The OE-style flange design helps maintain proper exhaust alignment, while the ceramic substrate supports efficient exhaust aftertreatment in a direct-fit format. If you are replacing a worn Subaru Legacy catalytic converter or a Subaru Outback rear converter, AP Exhaust 643146 provides a vehicle-specific solution with factory-style dimensions.

AP Emissions Technologies uses proprietary substrate chemistry and advanced manufacturing methods to produce converters with consistent fitment and efficient loading. Automated production processes and spinner welding help maintain exact OE dimensions, which is important when replacing a rear catalytic converter on Subaru Legacy and Subaru Outback models. This part cross-references 44620AC10A for the same application.

What It Helps Address

  • Check engine light related to catalyst efficiency faults
  • Failed emissions inspection on Federal-emissions Subaru Legacy or Outback models
  • Exhaust restriction from a deteriorated rear catalytic converter
  • Exhaust leaks at the converter flange connection
  • Loss of proper exhaust aftertreatment performance

Installation Notes and Tips

Verify Federal emissions configuration before ordering. This converter is listed for rear position use on 2010-2012 Subaru Legacy and 2010-2012 Subaru Outback applications. Confirm flange style, overall length, and exhaust routing against the original unit before installation. Not for sale or use on vehicles licensed in CA, CO, ME, and NY; restrictions may apply in other states, so check local requirements before installation.

Quality Assurance

AP Exhaust builds this converter to OE dimensions using controlled manufacturing processes for consistent fitment and emissions-system performance. The ceramic substrate and direct-fit construction reflect the brand’s focus on replacement parts that match the original exhaust layout.

Related reading

This part fits 9 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelLitersCylindersPositionNotes
2012SubaruLegacy2.5LH4RearDirect Fit; Federal Emissions; 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.
2012SubaruOutback2.5LH4RearDirect Fit; (10-12); 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.
2012SubaruOutback2.5LH4RearDirect Fit; Federal Emissions; 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.
2011SubaruLegacy2.5LH4RearDirect Fit; Federal Emissions; 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.
2011SubaruOutback2.5LH4RearDirect Fit; (10-12); 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.
2011SubaruOutback2.5LH4RearDirect Fit; Federal Emissions; 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.
2010SubaruLegacy2.5LH4RearDirect Fit; Federal Emissions; 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.
2010SubaruOutback2.5LH4RearDirect Fit; (10-12); 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.
2010SubaruOutback2.5LH4RearDirect Fit; Federal Emissions; 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.
Directly replaces or cross-references 1 part number
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
44620AC10A