The 2010 Mustang body design is new from end to end, this time with integrated multi-element headlamps replacing the twin round lamps of past Mustangs, a power-dome hood that droops over the grille at its leading edge, completely new side sculpting, and chamfered three-element taillamps that house sequential turn signals, blinking from the inside lamp to the outside lamp to help those following understand which way you're turning (a technology first used on the 1964 Thunderbird, reprised 46 years later).Ford says the new Mustang body yields 23 percent less aerodynamic lift at the front with a new slotted panel installed under the radiator to direct air, 50 percent better in front/rear lift balance, and has seven percent less aerodynamic drag. They tell us it is 12 percent quieter in wind noise than the outgoing car, 15 percent quieter in the case of the convertible. Ford also points to a 33 percent reduction in squeak and rattle performance, and a 10 percent improvement in speech intelligibility due to interior noise reductions, especially in the convertible.