New to this, what will the above do for me?

 

take away the throttle lag and give you any where from 15 to 25 hp give or take a few.

 

It will also cause an automatic transmission to bark the tires going into 2nd and 3rd gears. You need to check the GT Performance section of these forums, as this is discussed extensively. Do a search there. A worthwhile mod...

 

This

 

http://www.g6performance.com/forum/v...=229640#229640

 

Best bang for buck mod you can do for this generation Mustang unless you're planning on getting a S/C or turbo.
Do a little reading on the CAI + tune subject.