2011 Mustang V6 3.73

[11MustangV6373]

Hello I just upgraded to some BBK Longtube Headers with the Offroad X-pipe after upgrading my gears to the 3.73.
Now the car sounds better but it doesnt feel right. it feels like its lost horse power instead of gaining. what can i to my 91 tune so that it knows teh headers are providing more air. how do i change the fuel ratio. Can someone please help with this.

[mikel]

You really need a customtune when you alter the airflow that heavily, check with one of our cmr tuners like Bama to get it dialed in.

Thanks