AP Exhaust 642831 Catalytic Converter - Rear
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AP Exhaust

AP Exhaust 642831 Catalytic Converter - Rear

Brand AP Exhaust 642831
Position Rear
Body Material Stainless steel
Inlet Gasket Yes
Inlet Hardware None
Inlet Type A 3 bolt welded flange
O2 Sensor Ports None
Outlet Gasket Yes
Outlet Hardware None
Outlet Type A 3 bolt welded flange
Overall Length (IN) 10
Substrate Material Ceramic
Type Federal / epa direct-fit
Fits Acura · 8 vehicles

Direct-fit replacement. Built to OE dimensions for straightforward installation.

Stainless steel body. Corrosion-resistant construction helps stand up to heat and road wear.

Ceramic substrate. Engineered for efficient converter performance.

Cross-references 18160-RYE-A10 for the same application. See all 1.

$357.79Free shipping
In stock · usually ships same day before 1pm CST
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Step 2 — Quantity
Order total $357.79
Free shipping to the continental U.S.
Free returns within 60 days if it doesn't fit when fitment is verified.
Not what you need? See all Catalytic Converter options

AP Exhaust 642831 Catalytic Converter

AP Exhaust 642831 is a Federal / EPA direct-fit catalytic converter built for exact OE dimensions and fitment. It is engineered for the rear position on select Acura MDX and Acura ZDX applications, with stainless steel construction and a ceramic substrate for efficient exhaust treatment.

For shoppers searching for a rear catalytic converter for 2010-2013 Acura MDX or 2010-2013 Acura ZDX, this part number 642831 provides a direct-fit replacement with the correct flange style and sensor-port layout for the listed applications.

Key Features

  • Federal / EPA direct-fit catalytic converter
  • Stainless steel body for corrosion resistance
  • Ceramic substrate material
  • 3-bolt welded flange inlet and outlet
  • Inlet gasket included
  • Outlet gasket included
  • No O2 sensor ports
  • Overall length: 10 inches
  • Built to OE dimensions and fitment standards

Fitment Details

  • Fits 2010-2013 Acura MDX, 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.
  • Fits 2010-2013 Acura ZDX, 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.

What This Part Helps Address

  • Failed or restricted rear catalytic converter performance
  • Exhaust flow issues caused by a damaged converter core
  • Check engine light concerns related to converter efficiency
  • Fitment problems from non-OE-style replacement parts
  • Exhaust leaks at the inlet or outlet flange area

Installation Notes

Verify the rear position, flange configuration, and emissions requirements before installation. This AP Exhaust catalytic converter uses a 3-bolt welded flange at both the inlet and outlet, with no O2 sensor ports. Confirm vehicle emissions compliance for your state before purchase and installation.

This part cross-references Monroe Shocks & Struts (e.g., 18160-RYE-A10) for the same application.

Quality Assurance

AP Exhaust uses proprietary substrate chemistry and advanced manufacturing processes, including automated workstations, spinner welding equipment, and high-speed production lines, to produce converters with consistent OE-style fitment and efficient catalyst loading.

Related reading

This part fits 8 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelLitersCylindersPositionNotes
2013AcuraMDX3.7LV6RearDirect 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.
2013AcuraZDX3.7LV6RearDirect 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.
2012AcuraMDX3.7LV6RearDirect 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.
2012AcuraZDX3.7LV6RearDirect 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.
2011AcuraMDX3.7LV6RearDirect 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.
2011AcuraZDX3.7LV6RearDirect 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.
2010AcuraMDX3.7LV6RearDirect 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.
2010AcuraZDX3.7LV6RearDirect 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.
18160-RYE-A10