Would adding a catted X pipe mess up my tune?

[tonydahose]

i just got my car pullied and tuned over at Dean's a week ago. i have an opportuniy to get a catted magnaflow X pipe now. i have a flowmaster catback and jlt cold air kit on the cobra. i called Dean but he doesnt answer the phone much. so will this mess with my tune at all? here is the dyno.

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[Flyn]

More airflow = leaner, higher A/F. I'm not sure how much better flowing that X pipe combo is. You can always add it then do a dyno pull to see where you are. With your current A/F that wouldn't be a bad idea. Better safe than sorry.

 

[IZZy]

Ask whoever tuned the car