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. PREMIUM SCT: CUSTOM TUNE by "MUSTANG SPECIALTIES". FULL MAGNAFLOW COMPITION EXHAUST, LT. HEADERS AND X PIPE, LMR: GEN2 2010 STYLE HEADLIGHTS, RAXIOM: 2010 SMOKED COYOTE TAIL LIGHTS, WHEELS: STAGGERED WHL 22X8.5F-22X10R MORE LISTED INSIDE.