High Flow cats and a custom tune

[stinger556]

I just ordered a custom 5 star tune and my current cats need to be replaced so I ordered high flow (200 cell) cats but the tune has already been ordered (email tune). Does it make a difference at all with the tune whether the hi flows are on or not? thanks

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[IrishStallion]

What year car?? If you get a check engine light you may have to have tuner send you another file.

 

[Jackson1320]

Most custom tunes are setup and ready for exhaust mods.

 

[Jordan @ Lethal]

You shouldn't get any check engine light as long as those cats function as well as the oem ones.

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