The Superlift 3.5" lift kit for the Chevy Silverado and GMC Sierra 1500 features upper control arms with a fitted steel structure. The control arms are constructed using laser cut plate steel that has been slotted and tabbed for a precise fit. These upper control arms are oriented in an I-beam fashion for superior strength. There is no cutting of the rear crossmembers making this unique design stand out from the competition. The factory splash guard is retained and you can run your factory wheels without spacers. Kit FeaturesTop strut spacers Upper control arms with pre-installed MOOG ball joints and bushings Rear Shadow Nitro shocks Rear block kit Lifetime Warranty and Satisfaction GuaranteeShock boots sold separatelyView kit installation instructions</strong