Walker 16977 Catalytic Converter
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Walker
 EPA

Walker 16977 Catalytic Converter

Brand Walker 16977
Grade Type Premium
Body Shape Round
Inlet Type 3 bolt welded flange
Front Body Height 4.000
Front Body Length 6.500
Front Body Width 4.000
NUMBER OF CONVERTER BODIES 2
Rear Body Height 4.000
Rear Body Length 7.500
Rear Body Width 4.000
Shape Round
Product line EPA
Fits Cadillac, Chevrolet, and GMC · 39 vehicles

EPA-compliant design. Built for emissions-standard replacement on select OBDII vehicles.

Direct-fit construction. Matches the listed exhaust layout for application-specific service.

Walker Ultra line. Premium replacement engineering from Walker's direct-fit catalog.

Cross-references AP Exhaust 645155, Walker Exhaust 52617 and 22948166 for the same application. See all 3.

$1,112.98Free shipping
In stock · usually ships same day before 1pm CST
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Step 2 — Quantity
Order total $1,112.98
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

Overview

Walker EPA 16977 is a premium direct-fit catalytic converter built for EPA-compliant replacement on select OBDII vehicles. It is engineered for a round-body layout with a welded flange inlet and dual converter bodies for the specified application.

Fits 2014-2018 Chevrolet Silverado 1500, N/A. Fits 2014-2018 GMC Sierra 1500, N/A. Fits 2015-2020 Cadillac Escalade, N/A. Fits 2015-2020 Cadillac Escalade ESV, N/A. Fits 2015-2020 GMC Yukon, N/A. Fits 2015-2020 GMC Yukon XL, N/A. Fits 2018-2020 Chevrolet Tahoe, N/A. Fits 2019-2020 Chevrolet Suburban, N/A.

Key Features

  • Premium-grade catalytic converter for EPA-standard replacement.
  • Direct-fit design for select import and domestic OBDII applications.
  • Round body construction with a 3-bolt welded flange inlet.
  • Dual converter body layout for the listed application.
  • Walker EPA 16977 is part of the Ultra Direct-Fit Catalytic Converter line.

Detailed Description

Walker EPA 16977 is a Walker Ultra Direct-Fit Catalytic Converter designed for EPA-compliant service on 1996-and-newer OBDII vehicles. The round body shape and welded flange inlet support a replacement that follows the original exhaust layout for the listed Cadillac, Chevrolet, and GMC applications. This part number, 16977, is identified with the Walker EPA line and cross-references Walker Exhaust 52617 for the same application.

Common Uses

  • Replacing a failed catalytic converter that triggers emissions-related fault codes.
  • Restoring exhaust flow when the converter substrate is restricted.
  • Addressing emissions test failures tied to converter efficiency.
  • Correcting exhaust leaks at the converter inlet flange.

Installation Notes

Verify the vehicle’s emissions configuration and match the listed EPA fitment before installation. Confirm the inlet style, body dimensions, and application details against the original exhaust system. Professional installation is recommended for proper sealing and emissions compliance.

Quality Assurance

Walker Ultra Direct-Fit Catalytic Converters are built to comply with EPA standards and are intended for OBDII applications. Part number 16977 is supported by Walker’s direct-fit product line for application-specific replacement.

Related reading

This part fits 39 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelLitersCylindersNotes
2020CadillacEscalade6.2LV8EPA
2020CadillacEscalade ESV6.2LV8EPA
2020ChevroletSuburban6.2LV8EPA
2020ChevroletTahoe6.2LV8EPA
2020GMCYukon6.2LV8EPA
2020GMCYukon XL6.2LV8EPA
2019CadillacEscalade6.2LV8EPA
2019CadillacEscalade ESV6.2LV8EPA
2019ChevroletSuburban6.2LV8EPA
2019ChevroletTahoe6.2LV8EPA
2019GMCYukon6.2LV8EPA
2019GMCYukon XL6.2LV8EPA
2018CadillacEscalade6.2LV8EPA
2018CadillacEscalade ESV6.2LV8EPA
2018ChevroletSilverado 15006.2LV8EPA
2018ChevroletTahoe6.2LV8EPA
2018GMCSierra 15006.2LV8EPA
2018GMCYukon6.2LV8EPA
2018GMCYukon XL6.2LV8EPA
2017CadillacEscalade6.2LV8EPA
2017CadillacEscalade ESV6.2LV8EPA
2017ChevroletSilverado 15006.2LV8EPA
2017GMCSierra 15006.2LV8EPA
2017GMCYukon6.2LV8EPA
2017GMCYukon XL6.2LV8EPA
2016CadillacEscalade6.2LV8EPA
2016CadillacEscalade ESV6.2LV8EPA
2016ChevroletSilverado 15006.2LV8EPA
2016GMCSierra 15006.2LV8EPA
2016GMCYukon6.2LV8EPA
2016GMCYukon XL6.2LV8EPA
2015CadillacEscalade6.2LV8EPA
2015CadillacEscalade ESV6.2LV8EPA
2015ChevroletSilverado 15006.2LV8EPA
2015GMCSierra 15006.2LV8EPA
2015GMCYukon6.2LV8EPA
2015GMCYukon XL6.2LV8EPA
2014ChevroletSilverado 15006.2LV8EPA
2014GMCSierra 15006.2LV8EPA
Directly replaces or cross-references 3 part numbers
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
AP Exhaust — 645155Walker Exhaust — 5261722948166