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OEM cats

This is a discussion on OEM cats within the General Help forums, part of the LSx Technical Help Section category; Is there a way to replace the stock cats with direct fits? i don't want to install headers but im ...

  1. #1
    Senior Member JayTA98's Avatar
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    Mean Black
    1998 Trans Am

    OEM cats

    Is there a way to replace the stock cats with direct fits? i don't want to install headers but im wondering when they get clogged what are my options. will an exhaust shop be able to weld universal ones to it?

    If it comes to worse then I will get headers with cats but im trying to stay away from that. Thanks.

  2. #2
    Senior Member JayTA98's Avatar
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    i kinda search and they sell direct fit but have to be special order. They are magaflow. they are around $350 for each side. i see why people go with headers is way cheaper plus the power gain.

  3. #3
    REAPER Z28 reaper ws6's Avatar
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    Navy Blue Metallic/Black
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    yep thats what i'm thinking off doing get some headers and ORY and a frost mail order tune, can't go wrong.

  4. #4
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    Headers and Kooks catted Y here. Here is a pic of the stock driver side cat for anyone interested in what they look like:



  5. #5
    Senior Member JayTA98's Avatar
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    Quote Originally Posted by pajeff02 View Post
    Headers and Kooks catted Y here. Here is a pic of the stock driver side cat for anyone interested in what they look like:


    Click for full size
    thats a nice looking header

  6. #6
    Junior Member speedfreak1's Avatar
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    1999 trans am

    when I bought my car it did not have no cats. and failed e-check here. found a muffler shop and they were able to weld in bullet style cats in to the ory. in only cost 320.00 for everything then passed e-check with no problems. its not as loud now. I have a magnaflow cat back.

  7. #7
    Senior Member JayTA98's Avatar
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    Quote Originally Posted by speedfreak1 View Post
    when I bought my car it did not have no cats. and failed e-check here. found a muffler shop and they were able to weld in bullet style cats in to the ory. in only cost 320.00 for everything then passed e-check with no problems. its not as loud now. I have a magnaflow cat back.
    thats not bad at all.

  8. #8
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    Quote Originally Posted by speedfreak1 View Post
    when I bought my car it did not have no cats. and failed e-check here. found a muffler shop and they were able to weld in bullet style cats in to the ory. in only cost 320.00 for everything then passed e-check with no problems. its not as loud now. I have a magnaflow cat back.

    Not a bad idea.

  9. #9
    Senior Member Z28_Driver's Avatar
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    Quote Originally Posted by JayTA98 View Post
    i kinda search and they sell direct fit but have to be special order. They are magaflow. they are around $350 for each side. i see why people go with headers is way cheaper plus the power gain.
    I went through the same thing over the winter. Passenger side cat was clogging. All the shops around here want to replace both. Cheapest price was 650 installed.
    I went with a set of BBK chrome headers instead. 370+tax from summit. includes the y-pipe and gaskets. I'm seperated the wiring harness so I could reroute it without splicing or buying extensions. It runs a little rich without the tune being updated, but it solved the cat problem cheap.

  10. #10
    Senior Member JayTA98's Avatar
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    Quote Originally Posted by Z28_Driver View Post
    I went through the same thing over the winter. Passenger side cat was clogging. All the shops around here want to replace both. Cheapest price was 650 installed.
    I went with a set of BBK chrome headers instead. 370+tax from summit. includes the y-pipe and gaskets. I'm seperated the wiring harness so I could reroute it without splicing or buying extensions. It runs a little rich without the tune being updated, but it solved the cat problem cheap.
    wow that sounds like a good deal. do they still have them for the same price?

  11. #11
    Senior Member Z28_Driver's Avatar
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    I think thats the regular price. I looked today and its still the same.
    They went in easy enough. No issues with rubbing or rattling. Only problem I had was I needed another clamp. Home depot pumbing section solved that.

  12. #12
    Senior Member JayTA98's Avatar
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    Quote Originally Posted by Z28_Driver View Post
    I think thats the regular price. I looked today and its still the same.
    They went in easy enough. No issues with rubbing or rattling. Only problem I had was I needed another clamp. Home depot pumbing section solved that.
    thx for the info. can you send me the link? i might be getting into those.
    Last edited by JayTA98; 05-26-2011 at 04:40 PM.

  13. #13
    Senior Member Z28_Driver's Avatar
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    Sunset Orange Metallic
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    pm sent.

  14. #14
    Senior Member JayTA98's Avatar
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    Mean Black
    1998 Trans Am

    received, thank you.

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    2002 Z28 Camaro

    Not to hijack the thread, but how many miles are the stock cats usually good for?

  16. #16
    Senior Member JayTA98's Avatar
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    i guess it depends. i have 108k on mine and they sound like they are still good.

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    guess it depends. i have 108k on mine and they sound like they are still good.
    I've got 65K, so I guess I should be OK until I get my headers done.

  18. #18
    Senior Member Z28_Driver's Avatar
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    My passenger side clogged at about 74,000.

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