Thanks Mike. i dont know what a CMR tuner is so i will be researching it. i see what you mean with the O2 sensors.

2011 Mustang V6 Coupe

Hey guys, I'm Ariel and this is my first Mustang. I havent done much but still working on it. So far I've upgraded:

Gears -- from: 2.73 -- to: 3.73

Headers -- BBK Headers and Offroad X-pipe

Air Filter -- K&N Filter

Wheels -- Strada 20 x 8.5/5 x 4.5

Tires -- Front: 245 x ...

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 ...

hey guys, i am going to install some BBK Long Tube Headers and an Off Road x-pipe. just wanting to know what i will be having to do next. as far as tuning my v6? i have 3.73 gears and Front tires 245/35/20, rear tires 275/275/35/20, no other mods.