Starting with their industry leading cross member and spindle technology, Fabtech pushes the envelope with superior ride height to properly clear 35 inch tall tires. Extensive design work was given to the extended length steering knuckles to keep the track width near stock with superior turning radius for maneuverability in tight spots. Lower control arm cross members are strengthened with cross tubes backed up by tubular frame struts to distribute front suspension impact loads. Rear suspension lift is accomplished via a block and add a leaf system.With two systems available. The Performance system also offers the Dirt Logic 2.5 or Dirt Logic 4.0 Adjustable Coilover shock in place of the factory front coilover assembly. Rear shock included in this package are the Dirt Logic 2.25 non-resi shocks (not in photo). Both systems have been properly designed to work with the factory Stabilitrak safety functions without reprogramming of the vehicle's computer.