From a Ford media release:
Improved driving dynamics
EPAS has made a dramatic contribution to Mustang GT driving dynamics, delivering quicker on-center steering response, increased effort at highway speeds and reduced effort required in low-speed parking maneuvers. EPAS allows specific tuning for the Mustang GT application.
The 2011 Mustang GT features an enhanced rear lower control arm to add stiffness, improve powertrain NVH control and sharpen handling. A stiffened rear stabilizer bar for better on-center steering is also included. Stabilizer bar diameters, spring rates and dampers all have been tuned for improved dynamics.
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Brembo brake package upgrade will be available for serious enthusiasts. This package includes 14-inch vented front discs from the GT500 Mustang, unique 19-inch alloy wheels and summer performance tires.
Added convenience content
For 2011, Mustang GT offers drivers several new convenience technologies, including:
Standard message center
Integrated blind spot mirrors
MyKey™ programmable vehicle key
New look
From the 5.0 fender badges to the new engine cover, Mustang GT honors and continues the proud heritage of its predecessors. The speedometer increases to 160 mph and the tachometer redline advances from 6,500 to 7,000 rpm.
Three vibrant new colors will be added for 2011 including Yellow Blaze Tri-Coat, Race Red and Ingot Silver.
Improved NVH control and convertible rigidity
For 2011, Mustang GT benefits from across-the-board NVH improvements. These include additional sound-deadening material on either side of the instrument panel, additional sound absorbtion behind interior trim panels and a real wheel arch liner to reduce noise on gravel or wet surfaces.
Mustang GT convertible models feature enhanced structural rigidity, with lateral stiffness improved by 12 percent versus the 2010 model. A tower-to-tower front strut brace is now standard, and the V-brace has been stiffened by adding gussets. The secondary crossmember also has been stiffened while a front Z-brace has been added, connecting primary and secondary crossmembers. A-pillar stiffening foam also has been added to increase rigidity.