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Re-tune after putting stock cats back in?

Joined
17 February 2011
Messages
69
I've just purchased a supercharged NSX. It was tuned with test pipes with AEM V2. But the car is too loud for me and I want to put in the stock cats. Would I need to do a re-tune after putting the stock cats back in? Would I need to re-tune after putting in high flow cats in? I'm just worried it might run lean.
 
I would think that it will run rich, as airflow would be more restricted but fuel would remain the same. So it doesn't seem dangerous. Do you have AFR logging? If not, I'd want a retune to make sure all is well.
 
You would most likely be absolutely fine but if you want to be fully dialed in on an expensive car with an expensive upgrade, just spend the four hundred bucks and get another tune
 
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