Fabtech’s new 4" Ultimate System for 2011 GM HD’s provides a mild lift height with an additional 2” of wheel travel for use with 35" tall tires. They have developed this system utilizing replacement upper control arms constructed of 1.50" OD .120" thick wall DOM tubing with heavy duty extended range ball joints. The new upper control arms attach to Fabtech ductile steering knuckles for proper ball joint and steering angles. The factory torsion bars remain in the stock position and use new forged adjusting keys to provide the proper amount of lift without excessive preload. There is no loss of ground clearance with this system. MSRP starts at $1169.00 for the complete 4” system with shocks.