Since yours is a Mag Ride you will eventually need these if you are going to do anything more than stockish rates and aero.
Ford Mustang Electronic Shock and Height Sensor Delete Kit
SDE magnetic shock and ride height delete kits (electronic shock delete) utilize simple plug-n-play technology that eliminates “Service Suspension” warning lights and speed limitations. SDE kits allow you to install aftermarket shocks on your vehicle originally equipped with Ford MagneRide...shockdeletes.com
Dave
i have 2 sets of sims im selling if you want.