Walker 55738 Catalytic Converter - Rear

Brand Walker 55738
Position Rear
Body Shape Round
Body Height 4.0
Body Length 8.0
Body Width 4.0
Outlet Quantity 1
Overall Length 53.13
Body Material Steel
Inlet 1 Type Welded flange
Inlet 2 Type Welded flange
Inlet Quantity 2
Outlet 1 Type Welded flange
Outlet 2 Type Welded flange
Product line EPA
Fits Acura and Honda · 49 vehicles

Direct-fit design. Simplifies exhaust replacement with a vehicle-specific layout.

EPA-compliant construction. Built for approved emissions applications on OBDII vehicles.

Steel body. Round housing with welded flange connections for a secure exhaust interface.

Cross-references 181505J6A10 for the same application. See all 1.

$313.15Free shipping
In stock · usually ships same day before 1pm CST
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Step 2 — Quantity
Order total $313.15
Free shipping to the continental U.S.
Free returns within 60 days if it doesn't fit when fitment is verified.

Direct-Fit EPA Catalytic Converter

Walker Ultra EPA catalytic converter 55738 is a direct-fit exhaust replacement for select Acura, Honda, and Ridgeline applications. It is built for OBDII vehicles and follows EPA standards for emissions compliance where applicable.

Key Features

  • Direct-fit design for easier exhaust system replacement
  • EPA-compliant construction for approved applications
  • Steel body with round housing
  • Welded flange inlet and outlet connections
  • Walker Ultra product line for import and domestic OBDII vehicles

Detailed Description

This catalytic converter is engineered around a direct-fit layout with a steel body, round case design, and welded flange connections at both the inlet and outlet. The overall length is 53.13 inches, with a compact converter body measuring 8.0 inches long, 4.0 inches wide, and 4.0 inches high. Part number 55738 is listed for rear exhaust applications on 2014-2020 Acura MDX, 2016-2020 Honda Pilot, and 2017-2020 Honda Ridgeline. This part cross-references Honda 181505J6A10 for the same application.

Walker EPA converters are positioned for vehicles that need an emissions-focused replacement with direct-fit packaging. For buyers searching for a rear catalytic converter for Acura MDX, Honda Pilot, or Honda Ridgeline, 55738 provides a fitment-specific option that matches the listed exhaust configuration.

What It Helps Address

  • Failed catalytic converter emissions testing
  • Check engine light concerns related to catalyst efficiency
  • Restricted exhaust flow from a worn converter
  • Replacement needs after corrosion or internal substrate damage

Installation Notes

Fits 2014-2020 Acura MDX, rear. Fits 2016-2020 Honda Pilot, rear. Fits 2017-2020 Honda Ridgeline, rear. Exhaust gasket is recommended, and additional parts are listed as needed to complete installation. Verify federal or California emissions requirements before purchase, since this application is not legal for sale or use in California and other CARB-compliant states.

Quality Assurance

Walker Ultra Direct-Fit Catalytic Converters are designed to comply with EPA standards and are intended for import and domestic OBDII vehicles. Part number 55738 is built to support emissions-compliant replacement needs within the listed federal applications.

This part fits 49 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelSubmodelLitersCylindersPositionNotes
2020AcuraMDXBase3.5LV6RearExhaust Gasket is Recommended; Additional part(s) needed to complete installation - 31377 , 31377 and 31737; Ultra Direct Fit Type; Fits Fed. & Calif. Emission Models; Not legal for sale or use in California and other CARB-compliant states. Legal in New York and Maine on EPA Federal Emission Equipped Vehicles only. Consult the aftermarket converter regulations in your state for details.; EPA
2020AcuraMDXSH-AWD3.5LV6RearExhaust Gasket is Recommended; Additional part(s) needed to complete installation - 31377 , 31377 and 31737; Ultra Direct Fit Type; Fits Fed. & Calif. Emission Models; Not legal for sale or use in California and other CARB-compliant states. Legal in New York and Maine on EPA Federal Emission Equipped Vehicles only. Consult the aftermarket converter regulations in your state for details.; EPA
2020HondaPilotTouring3.5LV6RearExhaust Gasket is Recommended; Additional part(s) needed to complete installation - 31377 , 31377 and 31737; Ultra Direct Fit Type; Fits Fed. & Calif. Emission Models; Not legal for sale or use in California and other CARB-compliant states. Legal in New York and Maine on EPA Federal Emission Equipped Vehicles only. Consult the aftermarket converter regulations in your state for details.; EPA
2020HondaPilotLX3.5LV6RearExhaust Gasket is Recommended; Additional part(s) needed to complete installation - 31377 , 31377 and 31737; Ultra Direct Fit Type; Fits Fed. & Calif. Emission Models; Not legal for sale or use in California and other CARB-compliant states. Legal in New York and Maine on EPA Federal Emission Equipped Vehicles only. Consult the aftermarket converter regulations in your state for details.; EPA
2020HondaPilotEX3.5LV6RearExhaust Gasket is Recommended; Additional part(s) needed to complete installation - 31377 , 31377 and 31737; Ultra Direct Fit Type; Fits Fed. & Calif. Emission Models; Not legal for sale or use in California and other CARB-compliant states. Legal in New York and Maine on EPA Federal Emission Equipped Vehicles only. Consult the aftermarket converter regulations in your state for details.; EPA
2020HondaPilotElite3.5LV6RearExhaust Gasket is Recommended; Additional part(s) needed to complete installation - 31377 , 31377 and 31737; Ultra Direct Fit Type; Fits Fed. & Calif. Emission Models; Not legal for sale or use in California and other CARB-compliant states. Legal in New York and Maine on EPA Federal Emission Equipped Vehicles only. Consult the aftermarket converter regulations in your state for details.; EPA
2020HondaPilotEX-L3.5LV6RearExhaust Gasket is Recommended; Additional part(s) needed to complete installation - 31377 , 31377 and 31737; Ultra Direct Fit Type; Fits Fed. & Calif. Emission Models; Not legal for sale or use in California and other CARB-compliant states. Legal in New York and Maine on EPA Federal Emission Equipped Vehicles only. Consult the aftermarket converter regulations in your state for details.; EPA
2020HondaRidgeline—3.5LV6RearExhaust Gasket is Recommended; Additional part(s) needed to complete installation - 31377 , 31377 and 31737; Ultra Direct Fit Type; Fits Fed. & Calif. Emission Models; Not legal for sale or use in California and other CARB-compliant states. Legal in New York and Maine on EPA Federal Emission Equipped Vehicles only. Consult the aftermarket converter regulations in your state for details.; EPA
2019AcuraMDXBase3.5LV6RearExhaust Gasket is Recommended; Additional part(s) needed to complete installation - 31377 , 31377 and 31737; Ultra Direct Fit Type; Fits Fed. & Calif. Emission Models; Not legal for sale or use in California and other CARB-compliant states. Legal in New York and Maine on EPA Federal Emission Equipped Vehicles only. Consult the aftermarket converter regulations in your state for details.; EPA
2019AcuraMDXSH-AWD3.5LV6RearExhaust Gasket is Recommended; Additional part(s) needed to complete installation - 31377 , 31377 and 31737; Ultra Direct Fit Type; Fits Fed. & Calif. Emission Models; Not legal for sale or use in California and other CARB-compliant states. Legal in New York and Maine on EPA Federal Emission Equipped Vehicles only. Consult the aftermarket converter regulations in your state for details.; EPA
2019HondaPilotTouring3.5LV6RearExhaust Gasket is Recommended; Additional part(s) needed to complete installation - 31377 , 31377 and 31737; Ultra Direct Fit Type; Fits Fed. & Calif. Emission Models; Not legal for sale or use in California and other CARB-compliant states. Legal in New York and Maine on EPA Federal Emission Equipped Vehicles only. Consult the aftermarket converter regulations in your state for details.; EPA
2019HondaPilotLX3.5LV6RearExhaust Gasket is Recommended; Additional part(s) needed to complete installation - 31377 , 31377 and 31737; Ultra Direct Fit Type; Fits Fed. & Calif. Emission Models; Not legal for sale or use in California and other CARB-compliant states. Legal in New York and Maine on EPA Federal Emission Equipped Vehicles only. Consult the aftermarket converter regulations in your state for details.; EPA
2019HondaPilotEX3.5LV6RearExhaust Gasket is Recommended; Additional part(s) needed to complete installation - 31377 , 31377 and 31737; Ultra Direct Fit Type; Fits Fed. & Calif. Emission Models; Not legal for sale or use in California and other CARB-compliant states. Legal in New York and Maine on EPA Federal Emission Equipped Vehicles only. Consult the aftermarket converter regulations in your state for details.; EPA
2019HondaPilotElite3.5LV6RearExhaust Gasket is Recommended; Additional part(s) needed to complete installation - 31377 , 31377 and 31737; Ultra Direct Fit Type; Fits Fed. & Calif. Emission Models; Not legal for sale or use in California and other CARB-compliant states. Legal in New York and Maine on EPA Federal Emission Equipped Vehicles only. Consult the aftermarket converter regulations in your state for details.; EPA
2019HondaPilotEX-L3.5LV6RearExhaust Gasket is Recommended; Additional part(s) needed to complete installation - 31377 , 31377 and 31737; Ultra Direct Fit Type; Fits Fed. & Calif. Emission Models; Not legal for sale or use in California and other CARB-compliant states. Legal in New York and Maine on EPA Federal Emission Equipped Vehicles only. Consult the aftermarket converter regulations in your state for details.; EPA
2019HondaRidgeline—3.5LV6RearExhaust Gasket is Recommended; Additional part(s) needed to complete installation - 31377 , 31377 and 31737; Ultra Direct Fit Type; Fits Fed. & Calif. Emission Models; Not legal for sale or use in California and other CARB-compliant states. Legal in New York and Maine on EPA Federal Emission Equipped Vehicles only. Consult the aftermarket converter regulations in your state for details.; EPA
2018AcuraMDXBase3.5LV6RearExhaust Gasket is Recommended; Additional part(s) needed to complete installation - 31377 , 31377 and 31737; Ultra Direct Fit Type; Fits Fed. & Calif. Emission Models; Not legal for sale or use in California and other CARB-compliant states. Legal in New York and Maine on EPA Federal Emission Equipped Vehicles only. Consult the aftermarket converter regulations in your state for details.; EPA
2018AcuraMDXSH-AWD3.5LV6RearExhaust Gasket is Recommended; Additional part(s) needed to complete installation - 31377 , 31377 and 31737; Ultra Direct Fit Type; Fits Fed. & Calif. Emission Models; Not legal for sale or use in California and other CARB-compliant states. Legal in New York and Maine on EPA Federal Emission Equipped Vehicles only. Consult the aftermarket converter regulations in your state for details.; EPA
2018HondaPilotTouring3.5LV6RearExhaust Gasket is Recommended; Additional part(s) needed to complete installation - 31377 , 31377 and 31737; Ultra Direct Fit Type; Fits Fed. & Calif. Emission Models; Not legal for sale or use in California and other CARB-compliant states. Legal in New York and Maine on EPA Federal Emission Equipped Vehicles only. Consult the aftermarket converter regulations in your state for details.; EPA
2018HondaPilotLX3.5LV6RearExhaust Gasket is Recommended; Additional part(s) needed to complete installation - 31377 , 31377 and 31737; Ultra Direct Fit Type; Fits Fed. & Calif. Emission Models; Not legal for sale or use in California and other CARB-compliant states. Legal in New York and Maine on EPA Federal Emission Equipped Vehicles only. Consult the aftermarket converter regulations in your state for details.; EPA
2018HondaPilotEX3.5LV6RearExhaust Gasket is Recommended; Additional part(s) needed to complete installation - 31377 , 31377 and 31737; Ultra Direct Fit Type; Fits Fed. & Calif. Emission Models; Not legal for sale or use in California and other CARB-compliant states. Legal in New York and Maine on EPA Federal Emission Equipped Vehicles only. Consult the aftermarket converter regulations in your state for details.; EPA
2018HondaPilotElite3.5LV6RearExhaust Gasket is Recommended; Additional part(s) needed to complete installation - 31377 , 31377 and 31737; Ultra Direct Fit Type; Fits Fed. & Calif. Emission Models; Not legal for sale or use in California and other CARB-compliant states. Legal in New York and Maine on EPA Federal Emission Equipped Vehicles only. Consult the aftermarket converter regulations in your state for details.; EPA
2018HondaPilotEX-L3.5LV6RearExhaust Gasket is Recommended; Additional part(s) needed to complete installation - 31377 , 31377 and 31737; Ultra Direct Fit Type; Fits Fed. & Calif. Emission Models; Not legal for sale or use in California and other CARB-compliant states. Legal in New York and Maine on EPA Federal Emission Equipped Vehicles only. Consult the aftermarket converter regulations in your state for details.; EPA
2018HondaRidgeline—3.5LV6RearExhaust Gasket is Recommended; Additional part(s) needed to complete installation - 31377 , 31377 and 31737; Ultra Direct Fit Type; Fits Fed. & Calif. Emission Models; Not legal for sale or use in California and other CARB-compliant states. Legal in New York and Maine on EPA Federal Emission Equipped Vehicles only. Consult the aftermarket converter regulations in your state for details.; EPA
2017AcuraMDXBase3.5LV6RearExhaust Gasket is Recommended; Additional part(s) needed to complete installation - 31377 , 31377 and 31737; Ultra Direct Fit Type; Fits Fed. & Calif. Emission Models; Not legal for sale or use in California and other CARB-compliant states. Legal in New York and Maine on EPA Federal Emission Equipped Vehicles only. Consult the aftermarket converter regulations in your state for details.; EPA
2017AcuraMDXSH-AWD3.5LV6RearExhaust Gasket is Recommended; Additional part(s) needed to complete installation - 31377 , 31377 and 31737; Ultra Direct Fit Type; Fits Fed. & Calif. Emission Models; Not legal for sale or use in California and other CARB-compliant states. Legal in New York and Maine on EPA Federal Emission Equipped Vehicles only. Consult the aftermarket converter regulations in your state for details.; EPA
2017HondaPilotTouring3.5LV6RearExhaust Gasket is Recommended; Additional part(s) needed to complete installation - 31377 , 31377 and 31737; Ultra Direct Fit Type; Fits Fed. & Calif. Emission Models; Not legal for sale or use in California and other CARB-compliant states. Legal in New York and Maine on EPA Federal Emission Equipped Vehicles only. Consult the aftermarket converter regulations in your state for details.; EPA
2017HondaPilotLX3.5LV6RearExhaust Gasket is Recommended; Additional part(s) needed to complete installation - 31377 , 31377 and 31737; Ultra Direct Fit Type; Fits Fed. & Calif. Emission Models; Not legal for sale or use in California and other CARB-compliant states. Legal in New York and Maine on EPA Federal Emission Equipped Vehicles only. Consult the aftermarket converter regulations in your state for details.; EPA
2017HondaPilotEX3.5LV6RearExhaust Gasket is Recommended; Additional part(s) needed to complete installation - 31377 , 31377 and 31737; Ultra Direct Fit Type; Fits Fed. & Calif. Emission Models; Not legal for sale or use in California and other CARB-compliant states. Legal in New York and Maine on EPA Federal Emission Equipped Vehicles only. Consult the aftermarket converter regulations in your state for details.; EPA
2017HondaPilotElite3.5LV6RearExhaust Gasket is Recommended; Additional part(s) needed to complete installation - 31377 , 31377 and 31737; Ultra Direct Fit Type; Fits Fed. & Calif. Emission Models; Not legal for sale or use in California and other CARB-compliant states. Legal in New York and Maine on EPA Federal Emission Equipped Vehicles only. Consult the aftermarket converter regulations in your state for details.; EPA
2017HondaPilotEX-L3.5LV6RearExhaust Gasket is Recommended; Additional part(s) needed to complete installation - 31377 , 31377 and 31737; Ultra Direct Fit Type; Fits Fed. & Calif. Emission Models; Not legal for sale or use in California and other CARB-compliant states. Legal in New York and Maine on EPA Federal Emission Equipped Vehicles only. Consult the aftermarket converter regulations in your state for details.; EPA
2017HondaRidgelineSport3.5LV6RearExhaust Gasket is Recommended; Additional part(s) needed to complete installation - 31377 , 31377 and 31737; Ultra Direct Fit Type; Fits Fed. & Calif. Emission Models; Not legal for sale or use in California and other CARB-compliant states. Legal in New York and Maine on EPA Federal Emission Equipped Vehicles only. Consult the aftermarket converter regulations in your state for details.; EPA
2017HondaRidgelineRTL3.5LV6RearExhaust Gasket is Recommended; Additional part(s) needed to complete installation - 31377 , 31377 and 31737; Ultra Direct Fit Type; Fits Fed. & Calif. Emission Models; Not legal for sale or use in California and other CARB-compliant states. Legal in New York and Maine on EPA Federal Emission Equipped Vehicles only. Consult the aftermarket converter regulations in your state for details.; EPA
2017HondaRidgelineRT3.5LV6RearExhaust Gasket is Recommended; Additional part(s) needed to complete installation - 31377 , 31377 and 31737; Ultra Direct Fit Type; Fits Fed. & Calif. Emission Models; Not legal for sale or use in California and other CARB-compliant states. Legal in New York and Maine on EPA Federal Emission Equipped Vehicles only. Consult the aftermarket converter regulations in your state for details.; EPA
2017HondaRidgelineRTS3.5LV6RearExhaust Gasket is Recommended; Additional part(s) needed to complete installation - 31377 , 31377 and 31737; Ultra Direct Fit Type; Fits Fed. & Calif. Emission Models; Not legal for sale or use in California and other CARB-compliant states. Legal in New York and Maine on EPA Federal Emission Equipped Vehicles only. Consult the aftermarket converter regulations in your state for details.; EPA
2017HondaRidgelineBlack Edition3.5LV6RearExhaust Gasket is Recommended; Additional part(s) needed to complete installation - 31377 , 31377 and 31737; Ultra Direct Fit Type; Fits Fed. & Calif. Emission Models; Not legal for sale or use in California and other CARB-compliant states. Legal in New York and Maine on EPA Federal Emission Equipped Vehicles only. Consult the aftermarket converter regulations in your state for details.; EPA
2017HondaRidgelineRTL-E3.5LV6RearExhaust Gasket is Recommended; Additional part(s) needed to complete installation - 31377 , 31377 and 31737; Ultra Direct Fit Type; Fits Fed. & Calif. Emission Models; Not legal for sale or use in California and other CARB-compliant states. Legal in New York and Maine on EPA Federal Emission Equipped Vehicles only. Consult the aftermarket converter regulations in your state for details.; EPA
2017HondaRidgelineRTL-T3.5LV6RearExhaust Gasket is Recommended; Additional part(s) needed to complete installation - 31377 , 31377 and 31737; Ultra Direct Fit Type; Fits Fed. & Calif. Emission Models; Not legal for sale or use in California and other CARB-compliant states. Legal in New York and Maine on EPA Federal Emission Equipped Vehicles only. Consult the aftermarket converter regulations in your state for details.; EPA
2016AcuraMDXBase3.5LV6RearExhaust Gasket is Recommended; Additional part(s) needed to complete installation - 31377 , 31377 and 31737; Ultra Direct Fit Type; Fits Fed. & Calif. Emission Models; Not legal for sale or use in California and other CARB-compliant states. Legal in New York and Maine on EPA Federal Emission Equipped Vehicles only. Consult the aftermarket converter regulations in your state for details.; EPA
2016AcuraMDXSH-AWD3.5LV6RearExhaust Gasket is Recommended; Additional part(s) needed to complete installation - 31377 , 31377 and 31737; Ultra Direct Fit Type; Fits Fed. & Calif. Emission Models; Not legal for sale or use in California and other CARB-compliant states. Legal in New York and Maine on EPA Federal Emission Equipped Vehicles only. Consult the aftermarket converter regulations in your state for details.; EPA
2016HondaPilotTouring3.5LV6RearExhaust Gasket is Recommended; Additional part(s) needed to complete installation - 31377 , 31377 and 31737; Ultra Direct Fit Type; Fits Fed. & Calif. Emission Models; Not legal for sale or use in California and other CARB-compliant states. Legal in New York and Maine on EPA Federal Emission Equipped Vehicles only. Consult the aftermarket converter regulations in your state for details.; EPA
2016HondaPilotLX3.5LV6RearExhaust Gasket is Recommended; Additional part(s) needed to complete installation - 31377 , 31377 and 31737; Ultra Direct Fit Type; Fits Fed. & Calif. Emission Models; Not legal for sale or use in California and other CARB-compliant states. Legal in New York and Maine on EPA Federal Emission Equipped Vehicles only. Consult the aftermarket converter regulations in your state for details.; EPA
2016HondaPilotEX3.5LV6RearExhaust Gasket is Recommended; Additional part(s) needed to complete installation - 31377 , 31377 and 31737; Ultra Direct Fit Type; Fits Fed. & Calif. Emission Models; Not legal for sale or use in California and other CARB-compliant states. Legal in New York and Maine on EPA Federal Emission Equipped Vehicles only. Consult the aftermarket converter regulations in your state for details.; EPA
2016HondaPilotElite3.5LV6RearExhaust Gasket is Recommended; Additional part(s) needed to complete installation - 31377 , 31377 and 31737; Ultra Direct Fit Type; Fits Fed. & Calif. Emission Models; Not legal for sale or use in California and other CARB-compliant states. Legal in New York and Maine on EPA Federal Emission Equipped Vehicles only. Consult the aftermarket converter regulations in your state for details.; EPA
2016HondaPilotEX-L3.5LV6RearExhaust Gasket is Recommended; Additional part(s) needed to complete installation - 31377 , 31377 and 31737; Ultra Direct Fit Type; Fits Fed. & Calif. Emission Models; Not legal for sale or use in California and other CARB-compliant states. Legal in New York and Maine on EPA Federal Emission Equipped Vehicles only. Consult the aftermarket converter regulations in your state for details.; EPA
2015AcuraMDXBase3.5LV6RearExhaust Gasket is Recommended; Additional part(s) needed to complete installation - 31377 , 31377 and 31737; Ultra Direct Fit Type; Fits Fed. & Calif. Emission Models; Not legal for sale or use in California and other CARB-compliant states. Legal in New York and Maine on EPA Federal Emission Equipped Vehicles only. Consult the aftermarket converter regulations in your state for details.; EPA
2015AcuraMDXSH-AWD3.5LV6RearExhaust Gasket is Recommended; Additional part(s) needed to complete installation - 31377 , 31377 and 31737; Ultra Direct Fit Type; Fits Fed. & Calif. Emission Models; Not legal for sale or use in California and other CARB-compliant states. Legal in New York and Maine on EPA Federal Emission Equipped Vehicles only. Consult the aftermarket converter regulations in your state for details.; EPA
2014AcuraMDXBase3.5LV6RearExhaust Gasket is Recommended; Additional part(s) needed to complete installation - 31377 , 31377 and 31737; Ultra Direct Fit Type; Fits Fed. & Calif. Emission Models; Not legal for sale or use in California and other CARB-compliant states. Legal in New York and Maine on EPA Federal Emission Equipped Vehicles only. Consult the aftermarket converter regulations in your state for details.; EPA
2014AcuraMDXSH-AWD3.5LV6RearExhaust Gasket is Recommended; Additional part(s) needed to complete installation - 31377 , 31377 and 31737; Ultra Direct Fit Type; Fits Fed. & Calif. Emission Models; Not legal for sale or use in California and other CARB-compliant states. Legal in New York and Maine on EPA Federal Emission Equipped Vehicles only. Consult the aftermarket converter regulations in your state for details.; EPA
Directly replaces or cross-references 1 part number
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
181505J6A10