Gen.2 Prius After market CAT. install Update

Discussion in 'Gen 2 Prius Main Forum' started by ski.dive, Jan 21, 2021.

  1. ski.dive

    ski.dive Active Member

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    ***I had a local Muffler Shop install the $120 aftermarket CAT. & weld it on for $80.00
    Total cost parts & labor $200

    I used the same 02 sensor and donut gasket that I had on the OEM CAT.

    My 08 Prius runs much better with the aftermarket CAT. =Also getting approx. 3 more miles per gallon.
    NO CODES & RUNS GREAT!!!

    PS- I sold the Prius OEM CAT. for $1300
     
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  2. TMR-JWAP

    TMR-JWAP Senior Member

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    Another success story!!!!!!!
    and the $$ is in your pocket instead of some POS thief!
     
  3. edthefox5

    edthefox5 Senior Member

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  4. ski.dive

    ski.dive Active Member

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    Update=
    I'm still getting 3-4 more MPG after the aftermarket CAT install-
    2008 Prius runs great!!
     
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  5. Bunce

    Bunce Active Member

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  6. ski.dive

    ski.dive Active Member

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  7. SCgen2Owner

    SCgen2Owner New Member

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    who did you sell the cat to? I'm thinking about doing the exact thing you did.
     
  8. ski.dive

    ski.dive Active Member

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    Sold the CAT. on Ebay.
     
  9. Eduardas Ustinovas

    Eduardas Ustinovas New Member

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    got 08 prius with stolen cat, got aftermarket on ebay, installled ir and everythink looks and sounds good but i get code P0420(cat efficiency below threshhold) after 20 miles of driving it, any help? suggestion? special procedure with aftermarket cats?
    its california car
     
  10. Bunce

    Bunce Active Member

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    Did you also install the oxygen sensor?
     
  11. Eduardas Ustinovas

    Eduardas Ustinovas New Member

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  12. Eduardas Ustinovas

    Eduardas Ustinovas New Member

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    maybe i made a mistake using aftermarket o2 sensor on ebay for $20?
     
  13. ski.dive

    ski.dive Active Member

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    I used the same old O2 sensor that was on the Prius after I installed the aftermarket Cat.
     
  14. edthefox5

    edthefox5 Senior Member

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  15. mr_guy_mann

    mr_guy_mann Member

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    Try driving it for a few days. I have heard that you need to "break in" a new cat before it will perform properly.

    Posted via the PriusChat mobile app.
     
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