if your going to take the time and money to change your set do what i did. I got a ford lightning 90mm mass air, 42 lb. injectors, and the harness and connector for the mass air all for 349.00 on EBAY from EMUSTANGPARTS. I had the car SCT tuned on a Mustang Dyno. It drives perfect and the best part is as I add more parts in the future all i pay for is dyno time. with only 6psi my stock longblock vert went 13.2's at 106 but my 60' went from a 1.88 ( NA ) to a 2.08 with the charger.