2005+ Mustang GT JLT Series II Cold Air Intake kit w/ SCT X3 [CAI-FMG-0507-X3] - $549.00 : Stang-Hi Peformance
There are 3 performance packages from Stanghi that will get you 300 to the wheels.
After that I would recommend learning to drive the car. Find the local BMW and Porsche club and...
Call Cody at Stang-Hi performance in Baton Rouge, LA his number is 225-751-4321 he is one of the few tuners to actually go to the SCT in house training.
He has handled issues like this before..
race4food
If you have to ask that question then you will defiantly lose.. If you don't know how to race your mustang, asking on the board and have never been to the track then I would not recommend you race.