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Walker Exhaust Ultra EPA 93253 Universal Catalytic Converter 2.5" Inlet (Inside) 2.5" Outlet (Inside)

4.5 4.5 out of 5 stars 247 ratings

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Brand Walker
Material Stainless Steel
Shape Round

About this item

  • KEEPS CHECK ENGINE LIGHT OFF FOR EMISSIONS CODES -- OE-style high-technology washcoat and optimal precious metal load delivers required reduction in tailpipe emissions to match vehicle application
  • DURABLE -- Features stainless-steel body with aluminized pipe and heat shields for durability
  • FLEXIBLE SOLUTION -- Customizable design features expandable bushings for easy fitment and may require specialized fabrication and/or welding for installation
  • OE-STYLE DESIGN -- Features aluminized heat shields when originally equipped, to match OE design, protecting the undercarriage from heat created by the converter
  • BUY WITH CONFIDENCE -- Backed by Walker's 25,000-mile/40,000-kilometer emissions and 5-year 50,000-mile/80,000-kilometer structural integrity warranty. Visit Walkerexhaust.com for details.
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From the manufacturer

Walker Converters
Module 2

WALKER CATALYTIC CONVERTERS

Walker offers catalytic converters manufactured with a stainless-steel body, aluminized pipe and heat shields, that provide you peace-of-mind with assured compliance by engineers who set the standard. Whether it’s universal or direct-fit, catalytic converters feature an optimal high-technology washcoat and OE-design precious metal load that deliver required reduction in tailpipe emissions to match vehicle application. When selecting which catalytic converter is best for your vehicle, consult your state’s aftermarket converter regulations.

Walker Converters
module 4

FIVE CHECKS BEFORE REPLACING A CATALYTIC CONVERTER

Converters don’t fail on their own, complete these five checks before replacing a catalytic converter:

  1. Retrieve / repair all PCM trouble codes, check for any available TSBs or PCM re-flash updates
  2. Repair all exhaust leaks
  3. Make sure vehicle is in proper fuel control
  4. Always check for internal coolant leaks and excessive oil consumption
  5. Make sure you have the right part for the application

Walker Converters

Walker Converters

Walker Converters

Walker Converters

WHY A CATALYTIC CONVERTER FAILS

Converters don’t fail on their own; failure is usually a symptom of a larger problem. This is why it is important to identify the root cause of the failure and perform the repair prior to installing a new converter. Most catalytic converter failures fall under one of three categories:

  • Overheated, melted or broken converters
  • Coated/oil-fouled substrate
  • Structural damage

DIRECT-FIT VS. UNIVERSAL CONVERTERS

Walker universal fit catalytic converters have a customizable design with expandable bushings to adapt to connector pipes based on the repair. They may require specialized fabrication and welding for installation. Walker pre-bent routings hangers and flanges for OE-style direct-fit catalytic converters attach to the exhaust system for a direct-fit bolt-off, bolt-on solution. No matter what you select, all converters must meet the emission requirements of the vehicle and cannot be chosen by size alone.

WHAT TO DO IF CHECK ENGINE LIGHT COMES ON?

Troubleshoot an illuminated check engine light by making sure the gas and oil caps are on tight and that the oil dipstick is seated correctly. If the light remains lit, it could be triggered by a faulty oxygen sensor, failing catalytic converter, bad spark plugs, malfunctioning thermostat or bad mass air flow sensor. If the light remains on, make sure to make an appointment with your service provider as soon as possible.

WHAT IS THE DIFFERENCE BETWEEN EPA AND CARB CONVERTERS

EPA-compliant catalytic converters are for use on EPA or Federal emissions certified-vehicles. EPA-compliant catalytic converters cannot be sold or installed in California and Colorado and in certain circumstances in Maine and New York. In those states, you must install a CARB-compliant catalytic converter on CARB emissions certified vehicles in the states of California and Colorado, on all vehicles. CARB-compliant converters contain more catalyst material in order to converter emissions more efficiently and comply with stricter emissions reduction requirements. Check the vehicle’s emissions control information label and consult your state’s aftermarket converter regulations to select the right catalytic converter.

Product Description

Designed to comply with EPA emissions requirements while delivering premium performance and durability with assured compliance, Walker® Ultra® Universal Catalytic Converters are available for import and domestic OBDII (1996 and newer) vehicles.

Product information

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Warranty & Support

Amazon.com Return Policy:Amazon.com Voluntary 30-Day Return Guarantee: You can return many items you have purchased within 30 days following delivery of the item to you. Our Voluntary 30-Day Return Guarantee does not affect your legal right of withdrawal in any way. You can find out more about the exceptions and conditions here.
Product Warranty: For warranty information about this product, please click here. [PDF 99 KB]

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Walker Exhaust Ultra EPA 93253 Universal Catalytic Converter 2.5" Inlet (Inside) 2.5" Outlet (Inside)


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    Customer reviews

    4.5 out of 5 stars
    4.5 out of 5
    247 global ratings

    Customers say

    Customers like the performance, quality and value of the muffler. For example, they mention it works great, is of great value and that it makes their car quite.

    AI-generated from the text of customer reviews

    10 customers mention10 positive0 negative

    Customers are satisfied with the performance of the muffler. They mention that it works well, runs well, and makes their car quiet.

    "This product was great and made my car quite! It works and great" Read more

    "fit and worked great" Read more

    "THA-A-ANK YOU!!!! I'M PLEASED 😄 WITH THE PURCHASE... Granny vehicle is running great! Feeling good in the neighborhood. Happily...." Read more

    "Works great installed on 2003 Pontiac grand am inlet and outlet seem to be the same 2.5 inches which is a little bigger than stock exhaust which is..." Read more

    6 customers mention6 positive0 negative

    Customers are satisfied with the quality of the muffler. They mention that it is a perfect product for their TrailBlazer SS, and is happy with the value for money. Some say that the product is able to quiet their car.

    "This product was great and made my car quite! It works and great" Read more

    "...I also just passed emissions with it. I am really happy with the quality at this price. 100% reccomend." Read more

    "...Passed inspection today! Great build quality...buy with confidence!" Read more

    "Perfect product for my TrailBlazer SS. Very good sound not load but throaty." Read more

    6 customers mention6 positive0 negative

    Customers appreciate the value of the muffler.

    "Great product awesome price fixed the po420 code on wife's 04 Grand Prix gtp!" Read more

    "Great product for price" Read more

    "Great value! Mechanic installed no problem and my Impala runs great!" Read more

    "Great price and cheaper than the auto parts store..." Read more

    Exactly what I needed
    5 Stars
    Exactly what I needed
    Had a code, I think it was P0420 at this point I've forgotten but whatever code it was this converter fixed it.Now I've never had to do anything like this before so this was all new to me. I bought this item from the Amazon Warehouse for a discounted price which I thought would work out in the long run & it would have if I knew how to weld myself.I ended up finding a guy to do my welding job for $150, better than all the shops I called & got quotes for. One shop tried to tell the would charge me $500 to cut the old one off & weld the new one on so I said heck no, & found someone on Agies List.The money I spent in total, I coulve just bought a bolt on catalytic converter & saved myself the time because I ended up having to take the old one off myself & put it back on for the guy to charge me $150, it would've been a lot more if he had to do everything.After the job was done, I cleared the codes out of the cpu with my obd2 reader, drove around for 20-30 minutes & was able to pass emissions, of course after all the computers were ready. 3-4 months later, I still have no issues so I say this was exactly what I needed.I'm very pleased with the purchase or at least the outcome of the purchase. My only thing like I said was if I had known, I would've just bought the bolt on. You live & you learn so if I ever have to do anything like this again, I'll know what to do next time.
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    Top reviews from the United States

    Reviewed in the United States on June 26, 2023
    Reviewed in the United States on March 13, 2021
    Reviewed in the United States on March 27, 2022
    Customer image
    5.0 out of 5 stars Exactly what I needed
    Reviewed in the United States on March 27, 2022
    Had a code, I think it was P0420 at this point I've forgotten but whatever code it was this converter fixed it.

    Now I've never had to do anything like this before so this was all new to me. I bought this item from the Amazon Warehouse for a discounted price which I thought would work out in the long run & it would have if I knew how to weld myself.

    I ended up finding a guy to do my welding job for $150, better than all the shops I called & got quotes for. One shop tried to tell the would charge me $500 to cut the old one off & weld the new one on so I said heck no, & found someone on Agies List.

    The money I spent in total, I coulve just bought a bolt on catalytic converter & saved myself the time because I ended up having to take the old one off myself & put it back on for the guy to charge me $150, it would've been a lot more if he had to do everything.

    After the job was done, I cleared the codes out of the cpu with my obd2 reader, drove around for 20-30 minutes & was able to pass emissions, of course after all the computers were ready. 3-4 months later, I still have no issues so I say this was exactly what I needed.

    I'm very pleased with the purchase or at least the outcome of the purchase. My only thing like I said was if I had known, I would've just bought the bolt on. You live & you learn so if I ever have to do anything like this again, I'll know what to do next time.
    Images in this review
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    6 people found this helpful
    Report
    Reviewed in the United States on August 24, 2017
    Reviewed in the United States on November 15, 2020
    3 people found this helpful
    Report
    Reviewed in the United States on May 20, 2022
    Reviewed in the United States on April 8, 2023
    One person found this helpful
    Report
    Reviewed in the United States on June 16, 2022

    Top reviews from other countries

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    Richard Czaczkowski
    5.0 out of 5 stars There's no o2 bung on this cat light the factory unit.
    Reviewed in Canada on February 15, 2022
    Régis Fortin
    4.0 out of 5 stars Super produit efficace
    Reviewed in Canada on January 3, 2021
    2 people found this helpful
    Report
    Bernard L.
    4.0 out of 5 stars FIT..
    Reviewed in Canada on December 3, 2020