EPA Ultra Direct Fit Converter
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Walker EPA Ultra Direct Fit Converter

Part No. 54303 Warranty Details  
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Disclaimer: This product is not authorized to be shipped/picked-up CA.

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Walker® an industry leader for import and domestic applications, offers Walker® Ultra® Direct Fit Catalytic Converters designed for OBDII (1996 and newer) vehicles. They are engineered for specific vehicle emissions requirements, and feature a high load of precious metals, optimal substrate content, and a high technology washcoat to provide premium performance, and durability to comply with EPA emissions requirements.

Product Features:
  • Designed for use on OBDII (1996 and newer) vehicles
  • Flange to flange, direct fit design bolts to existing exhaust
  • High precious metal load and high technology washcoat for premium performance
  • Stainless steel body with aluminized pipe and heat shields for durability
  • Thick OE-style flanges, hangers and brackets for enhanced strength
  • OE-style routing and hanger position for easy installation
  • 25,000-mi catalytic performance & 5-year/50,000-mi structural integrity warranty
  • Meets EPA emissions requirements
  • Not legal for sale in California
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Body Length:10.000 in
Body Shape:Standard Oval
Body Width:6.125 in
Case Material:Stainless Steel
Height:4.250 in
Inlet Attachment Type:4 Bolt Flange
Inlet Quantity:1
Outlet Attachment Type:2 Bolt Welded Flange
Outlet Quantity:1
Overall Length:37.000 in
Substrate Material:Ceramic


by PowerReviews
WalkerEPA Ultra Direct Fit Converter

(based on 1 review)

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Reviewed by 1 customer

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(1 of 1 customers found this review helpful)


Not a exact-fit


from michigan

About Me Mechanic



    • Difficult To Install
    • Must Be Modified

    Best Uses

    • Replacement

    Comments about Walker EPA Ultra Direct Fit Converter:

    It is not a exact fix. Part of the pipe that passes under the oil pan. Has to be bented to clear. And that's no easy task if you don't have a heat wrench. Also the hanger mount is in the wrong location , it hit's the power steering line. I do not recommend this cat converter for DIY folks

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    Ask a question, get answers from real customers and in-house experts. For further assistance, please review your support options on our Contact Us page.

    1 Question | 1 Answer
    Displaying question 1
    • Q:

      I need to know the thread size, pitch, etc for the four studs lacated at the front of this. One of the studs broke off at the time it was installed, but I needed the car so I figured that could wait to be dealt with (if I needed to deal with it at all). Now a second stud has broken, so I'm looking to replace the whole unit but I also need to get the matching nuts to replace it and them. Thank you in advance for any help that can be offered.
      Asked on 11/18/2013 by Paul from Amsterdam, NY

      1 answer



        Hi Paul! I went ahead and called Walker Exhaust about the specifications for you. They informed me the studs are size M10x1.5 on the external portion of the stud, and the portion that is threaded into the converter flange is M8x1.25. I did some looking on our site for you, and I found one option with those measurements: Part Number 675-571. We have a few M10x1.5 nuts on our site in a variety of styles as well. I did find Part Number 700-275 which is a washered nut. In my experience, those style work best on the exhaust system. I hope this helps! -Keith

        Answered on 11/25/2013 by Keith from AAP
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