The Basic System includes front coilover spacers that utilize the factory Coilover shocks. Includes rear Performance shocks. The Nissan XD systems feature Fabtech's proven IFS technology with extended length ductile iron steering knuckles for proper factory electronic stability control functionality. Heavy duty 1/4in thick steel lower control arm crossmembers provide superior ground clearance while the integrated front differential skid plate adds protection to the drivetrain. Rear lift is accomplished with a block and u-bolt configuration.