No, The term you need to be using is "Performance". It will change the performance of your car, but it will not change the numbers of your HP. People do, confuse the two terms. I have 4.10 Gears on my car. Did that change the HP? No. But it does perform like a Bat out of Hell.
07 GT SCT: CUSTOM TUNE by "MUSTANG SPECIALTIES". STEEDA: CARBON FIBER HIGHFLOW CAI. STEEDA: 1 PIECE ALUMINUM DRIVESHAFT. FRPP: 4.10 GEARS. MAGNAFLOW: AGGRESSIVE 3" 409 STAINLESS STEEL DUAL EXHAUST. BBK: LT 304 STAINLESS STEEL HEADERS, BBK: o/r X-PIPE. MSD: BLASTER PERFORMANCE COIL PACKS. POWERSTOP: CROSS DRILLED SLOTTED ROTORS. WHEELS: STAGGERED WHL 22X8.5F-22X10R.