2007-2012 Shelby GT500 Mustang 600 hp Performance Upgrade Kit 2007-2012 Shelby GT500 Mustang 600 hp Performance Upgrade Parts Ready to wake up your Shelby GT500? Team JDM has a Performance Upgrade Package available that will do just that. Adding the SCT X4 to your car will pick up horsepower, torque,... MSRP: Was: Now: $1,249.00
