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Taking Catalytic converter out..??..

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Old 05-17-2018, 10:49 AM
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amcnd
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Default Taking Catalytic converter out..??..

Have a 1982 C3, new headers and dynomax mufflers. Original exhuast with the CAT in-between.. has anyone removed the CAT and gone straight 3 tubbing back (muffler shop recommended)..??.. run ok? Sound different? Thanks
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Old 05-17-2018, 10:52 AM
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calwldlife
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Originally Posted by amcnd View Post
Have a 1982 C3, new headers and dynomax mufflers. Original exhuast with the CAT in-between.. has anyone removed the CAT and gone straight 3 tubbing back (muffler shop recommended)..??.. run ok? Sound different? Thanks
if not required by state smog then toss it
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Old 05-17-2018, 11:07 AM
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Not in Utah. Thanks
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Old 05-18-2018, 09:58 AM
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terry82
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take the cat off .run a long rod thru it to get all the crap out of it .put it back on .cost is nothing.most shops will not touch a cat unless they are replaceing it.It will sound louder.depending on the mufflers you have ,you should not have a problem with the computer light.If you did get a light ,the fix is a heated 02 sensor.
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Old 05-23-2018, 01:28 PM
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stingr69
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Muffler shop will not do it for you as it violates federal law.
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Old 05-25-2018, 10:01 AM
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Legality aside, you would see a slight improvement in performance. More so if your mufflers were not new.
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Old 05-25-2018, 07:58 PM
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Take the cat off yourself, gut the interior, and put it back OR take the cat off, drive to a muffler shop with the front pipe and rear pipe temporarily suspended, and have the muffler shop weld in a pipe where the cat was BEFORE you went to the shop...no legality issue....RIDICULOUS law, BTW, about cats on 35 year old cars driven a few hundred miles per year.
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