Time to replace the catalytic converter

Discussion in 'KK General Discussion' started by Big Al, Aug 3, 2020.

  1. Big Al

    Big Al Let's get Cracken

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    My 2003 3.7 L has had the P0420 since I purchased it a month ago. Mechanic says I need a new converter. So is there 3 Cats on this Jeep.
    Buy OEM or has anyone had good luck with aftermarket ones.
     
  2. tommudd

    tommudd Moderator Staff Member Moderator

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    02-early 03 have 3 , 04 on has two
    OEM is best, a lot of the aftermarket do not flow as well as stock MOPAR
     
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  3. Big Al

    Big Al Let's get Cracken

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    So, need to get it scanned to find out which one is at fault I guess.
    How much if I DIY.
    How much if I take it in to it.
    Should I do everything from the manifolds to the tail pipe, (tail pipe and muffler has holes in them) or just do the single failing cat.
    My build was 09/02, 3 cats I guess.
     
  4. LibertyTC

    LibertyTC Well-Known Member Staff Member Moderator

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    The OEM cats are best, but very expensive.
    The lesser expensive option, would be the Walker Cats.
    There are some threads where members have used the walkers, with good success.