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Discussion Starter #1
Good day and thanks for looking at my question to all. I was curious if I would have any issues with installing long tube headers ....maybe high flow cats as well...but leaving the stock PCM and exhaust on my 2016 Challenger 392. Pros? Cons?

Yes eventually I will do a tune but I am not in a hurry. Looking for a bit more growl and eventually some more power with a blower/forged internals set up.... but that may not be for a while.

Thanks for your advice. It's always appreciated.

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From everything I have read, with long tubes a tune is highly suggested. They will cause a lean fuel issue without a tune and you'll get a check engine light with high flow cats. I don't know if would cause a catastrophic failure. People with personal experience will no doubt reply. You certainly won't get the benefit you could until you tune.

A Guy
 
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Longtubes will need a tune just for the fact that the cats are being moved further downstream. Plus high flow cats will still trigger a CEL.
 

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Discussion Starter #4
Thank you for the advice. Sounds like it's best to just swap out the PCM as well for an unlocked one and get a tune to avoid problems.

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