2019 Mustang Gt dyno numbers low

[Abominable]

I had my 2019 Mustang Gt with only 3100 miles dynoed after having kooks 1 7/8 catted long tube headers and a Jlt cold air intake and custom 93 tune on a dyno jet only made 443hp and 399 tq is these numbers low . Please let me know what you think.

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[Schwerin]

Depends on the dyno calibration, some read lower, so you'd need a baseline on that same dyno, or a stock 2018+ from that dyno to compare with.

Did you ask the tuner why it was lower than you expected?